text: TIME EXHIBITION CONTENT Visualization and Space Solution Introduction The Time Exhibition is an ambitious project, which developed from the original concept of the Clock Exhibition into a wider theme "Time and its measurement". Time is a theme to be found on the intersection of many scientific disciplines, social changes and cultures. It has always been a relevant and broad challenge for physicists, mathematicians, philosophers, astronomers, or cosmologists of our world. It influences the development of technology and science, the cultural values, social and political changes, and the cosmic worldview. The key to understanding time is the key to the universe and vice versa. Time and its measurement probably belong among the few immaterial, literally planetary bonds, which connect the history of our planet and pursuance of the earth civilisation despite the differences among nations, races, and religions. The mystery of time lies in the fact, that it is omnipresent and still does not take the slightest space. It can be measured, but not seen. It cannot be touched, deposed of, or kept. It is known, it is used constantly, but it still cannot be defined. It can be spent, lost, or even killed as a figure of speech, but it cannot be destroyed. There is never more, or less of it. It is the essential measure used to deduce other physical measuring systems, such as length, temperature, or mass, and still it differs on principle. Investigating time is always an open chapter and an eternal story. Just like investigating the universe. Time is subjected to scientific research and an eternal graphic inspiration. The invention of mechanical clock ranks right after the exploration of fire and the invention of wheel. The mechanical clock became a metaphor of human, as well as divine, conduct. At the end of the 14th century Nicole d´Oresm (1323 – 1382), Vicar at the cathedral in Rouen in France, wrote in his commentary to Aristotle's Book of heavens and world (Livre du ciel et du monde) that "the creation of heavens and the God's introduction of heavenly bodies into regular movement is similar to a human producing a clock, then setting it into movement and letting it work on its own accord". Johannes Kepler (1571 – 1630) describes his intentions as an attempt "to show that the heavenly device is … a kind of clockwork". The mechanical clock and the metaphor meant much more than the development of scientific thought and more perfect devices. They became the instrument of understanding the human behaviour, a decision accepted by the humankind, and an action taken by the humankind. The metaphor offered a model and an unvoiced imperative to manage and organise human lives, especially concerning the work process. The clock caused something that no other invention in the history of humankind had managed to cause. They offered an archetype of the manner in which the human civilisations could perceive God and Universe. It is apparent that the clock remains a great metaphor for the third millennium as well. And thus it is no exaggeration to say that to understand time means nothing less than to understand the world we live in. The idea of the Time Exhibition was initiated by the city of Šternberk and the Olomouc Region with the initial support of the Culture 2000 programme of the European Union. The truly European character of the project has been validated since its start by cooperation of Šternberk with the cities of Lorsch in Germany and Kungsbacka in Sweden and by a partial involvement of the British partner. Note: A part of the above-mentioned text would by used in the entrance hall of the building, following from the available room. The concept and intention of the Time Exhibition The coverage of the scenario of the Time Exhibition is wide, from the cosmic birth of time to the atomic clock and the most modern methods of time measurement. It respects the phenomenon of a family visitor and school visitors. It supports clearness, comprehensibility and communicability, it stresses the design, attraction, and playfulness. Where the budget permits, it will use the opportunity of an interactive conception and presentation. It takes into account the requirements of consultants in the field of museum-pedagogy referring to educational topics and interconnection to the system of education (RVP ZV). Institutions and organisation concerned with the protection of the environment (MŢP) were invited to join the exhibition and their task is to compile some selected issues of the protection of the environment (waste and the time needed for its decay – environmental education), saving the sources of energy (what light I consume, what I burn, what I pollute in a give time period – the constantly sustainable development). The issues of health impairments are a solid area open to health organisations. The contributions of these organisations may be included in a later period of realisation. Following the attempts to adapt the educational role of the exhibition to various target groups, the authors created the most illustrative presentation conception, both in the form of captions and graphic complements. The basic target group is a family visitor and school youth of primary and secondary schools. The exhibition also wants to devote itself to disabled citizens and create communication means for them. Contact screens or audio systems would be available for technically and professionally developed visitors with a deeper interest in the theme. The 3rd floor of the building is devoted to the zone of games, competitions, visual education, DIY, temporal exhibitions, minigalleries and accompanying programmes. The accompanying programmes provided by the organisers themselves and in the form of cooperation or exchanges with other museums are vital for the existence of the exhibition. A dialog has been held in this aspect with the Vlastivědné muzeum (Homeland museum) in Olomouc, Národní technické muzeum (National museum of technologies) and Uměleckoprůmyslové muzeum (Museum of arts and technologies) in Prague, the following museums have been contacted: The British Museum in London, National Maritime Museum in Greenwich in Great Britain, Deutsches Uhrenmuseum in Furtwangen, Germany. All these institutions promised to cooperate and exchange information, as well as programmes. 15 embassies in Prague have been addressed in the interest of presenting the diversity of traditions, histories, and cultures, requesting the mediation of contacts in their countries and provision of further documentation supporting the realisation. A number of them have reacted positively during preparations of the scenario (Mexico, Russia, the U.S.A., Switzerland). The scenario has distilled most subjects from the area of museum-pedagogy and subjects, which are supposed to lead to linking the exhibition contents to the educational programme of schools. PaedDr. Marie Hrachovcová and Mgr. Miroslav Dopita, PhD. From the Palacký University in Olomouc are the expert counsellors in this area. The musical element, scenic sound will have an important role. The scenario creators got acquainted with a number of European and American exhibitions of a similar orientation and learned from them. If these intentions are realised, there is a chance of creating an original and unique centre of entertainment and education of a European format. The authors segment the exhibition chronologically with inserted topics that are outside the chronological order and are important from the viewpoint of the regional presentation (watchmaking in the Olomouc region within the European context) or from the viewpoint of making the exhibition special and attractive (time in art, music, medicine, etc.). Attention will be paid to balance of technological and philosophical perception of time and its measurement. The fact, that some problems connected with the existence of universe as well as time are themes with yet unknown answers, have been considered as open for further investigations and research. The selected quotations bring closer the view of time from the perspective of outstanding personalities and the passages from poetry shift the seemingly technical topics into the world of imagination. The whole concept is significant by its variance from the traditionalistic museum interpretation of loose work with space to stressing the graphic design, stage elements and a loose attitude to selected objects from the area of visual educational aids, that are characteristic for their high resistance. Some exhibits will be manufactured especially for this purpose (pendulum). The authors worked with a whole range of graphic bases whose copies it will be necessary to make for the purposes of the exhibition. This is a rather extensive project, which could be elaborated by art schools in the whole country during the realisation and for reasonable remuneration. The original exhibit whose selection has been accomplished by consultees will be lent from the collections of Vlastivědné muzem in Olomouc and Národní technické muzeum in Prague. The consultees of the Time Exhibition are Radko Kynčl (NTM) and Mgr. Radim Himmler (VMO). 1ST FLOOR – GROUND FLOOR 1. ENTRANCE CORRIDOR – PASSAGEWAY (101) Zone clocks saying the time in various world metropolises to be placed along the entrance corridor. Above the entrance into the CENTRAL HALL – VESTIBULE (102) – A DIGITAL CLOCK saying the time of Greenwich prime meridian. Distinctly marked entrance into the room BOX OFFICE, RETAIL, INFORMATION CENTRE (108) 2. BOX OFFICE AND INFORMATION CENTRE (108) The box office, shops of souvenirs, books and other assortment connected with the theme of time, that are appropriate for retail. Having bought the ticket the visitor returns into the ENTRANCE CORRIDOR and enters the CENTRAL HALL – VESTIBULE (102) via the main entrance. The entrance into the CENTRAL HALL, as well as return into the ENTRANCE CORRIDOR (101) is designed with automatic turnstiles. Disabled visitors, V.I.P. and other special and individual attention-seeking visitors will be able to use the direct entrance from the BOX OFFICE (108) into the VESTIBULE (102). 3. VESTIBULE – HALL A cloakroom, sanitary facilities, necessary technical and cleaning hinterland, and AUDIOGUIDE hire will be place in the room numbered 102. The directory depicting the projection of floors and content segmenting of the rooms. Possibility of placing attendance recorders where the visitors could mark their tickets. They could try to estimate how much time they would spend at the exhibition and compare it with the reality later. Group visits would start in the VESTIBULE, they would be lead by GUIDES. The central hall would serve to permanently promote the SPONSORS and PARTNERS of the Time Exhibition. Placing the lettering: ONE HAS NOTHING MORE PRECIOUS OR VALUABLE THAN TIME Ludwig van Beethoven Introductory text: TIME AND ITS MEASUREMENT Time is a theme to be found on the intersection of many scientific disciplines, social changes and cultures. It has always been a relevant and broad challenge for physicists, mathematicians, philosophers, astronomers, or cosmologists of our world. It influences the development of technology and science, the cultural values, social and political changes, and the cosmic worldview. The key to understanding time is the key to the universe and vice versa. Time and its measurement probably belong among the few immaterial, literally planetary bonds, which connect the history of our planet and pursuance of the earth civilisation despite the differences among nations, races, and religions. Investigating time is always an open chapter and an eternal story. Time is subjected to scientific research and an eternal graphic inspiration. The mechanical clock and the metaphor meant much more than the development of scientific thought and more perfect devices. They became the instrument of understanding the human behaviour, a decision accepted by the humankind, and an action taken by the humankind. The metaphor offered a model and an unvoiced imperative to manage and organise human lives, especially concerning the work process. The clock caused something that no other invention in the history of humankind had managed to cause. They offered an archetype of the manner in which the human civilisations could perceive God and Universe. It is apparent that the clock remains a great metaphor for the third millennium as well. And thus it is no exaggeration to say that to understand time means nothing less than to understand the world we live in. The idea of the Time Exhibition was initiated by the city of Šternberk and the Olomouc Region with the initial support of the Culture 2000 programme of the European Union. The truly European character of the project has been validated since its start by cooperation of Šternberk with the cities of Lorsch in Germany and Kungsbacka in Sweden. The exhibits belong to collections of the Vlastivědné muzeum in Olomouc and Národní technické muzeum in Prague, whose experts also provided important help. ROOM 111 (115 m2) COSMIC TIME The room devoted to cosmic time will be mostly of stage design. The segmented dome which is formed as gothic will be remind of night sky, either using a direct stylised ceiling painting, or projection. The illusion of Stonehenge as a prehistoric form of observatory, calendar, as well as a ritual spot will dominate the room. It will be created using theatrical scenic materials. The individual alcoves will successively clarify the function of heavenly bodies in the perception of space-time. To achieve clearness the form of 3d models will be used in the maximum available extent; they will enable interaction including a model of tellurium or planetarium. The whole space will be made up with artificial lighting serving especially to illustrate the function of light and shadow as prehistoric instruments of time measurement. The front space of the room will belong to the Sun and creating the illusion of sun source. Any external light will be eliminated. The following notice before the entrance: COSMIC TIME Wall no. 1 right of the entrance Text: Birth of the Universe and Time – Big Bang 13-15 billion years ago, the universe as known today was only a little grain of extreme density, mass and energy presenting infinitely strong gravity field. It was very hot at the same time and could not remain in this state. An event, which the contemporary cosmologists call the Big Bang, occurred. The red-hot substance was spilling into the growing space, then was cooling gradually and turned into a gas form, which gave birth to stars and galaxies. Our solar system arose 8 billion years later. The space was created at the moment of the Big Bang and Time started to pass. What had happened before the Big Bang? Assuming the theory of the Big Bang is correct, the answer is simple: nothing. Since if time itself started only with the Big Bang, there had been no "before" where anything could happen. The concept of time which was suddenly "switched on" in a primary phenomenon, is rather difficult to understand. This, however, is not a new idea. After all, St. Augustine Aurelius claimed as early as in the 5 th century, that: "The Universe was not created in time, but simultaneously with time". Attempting to confront inquisitive questions – what had the God been doing before creating the Universe? – Augustine placed the God out of time and made Him the Creator of time itself. The idea of time being created simultaneously with the Universe thus naturally conforms to the Christian theology. Paul Davies: from the book "On Time" (P. Davies – a British physicist, Professor at the Cambridge, London, Newcastle and Adelaide Universities, the holder of the prestigious Templeton Award, the top world award for an intellectual performance). The time begins at the moment of the Big Bang, as the previous times are not defined… God may have created the Universe at any moment in the past. However, if the Universe is extending, there might be reasons why it has started to extend. We can still imagine, that God created the Universe at the moment of the Big Bang or even later. It makes no sense, however, to presume, that the Universe had been created before the Big Bang. The expanding model does not exclude a creator, but it limits the time when the job could have been done… Some people think that science should only concern those laws of physics that describe the development of the Universe. The issue of the original conditions then fall into the field of metaphysics, rather than theology. These people would say that God is omnipotent and thus could create the Universe according to His own will. He had, however, obviously chosen such a universe that develops following exact laws and therefore the presumption, that some laws conducted the original state, seems well-founded. Stephen W. Hawking: from the book "A Concise History of Time" (S.W. Hawking – a British scientist, a respected world expert in the field of cosmology and quantum theory of gravity, he lectures as a professor at the Cambridge University despite his severe disability cause by a disease and continues his research.) Text: HISTORY OF THE UNIVERSE Illustration: Scheme Time: Zero The Big Bang, birth of the Universe The Big Bang is the primary explosion of energy and matter, which means the birth of the Universe. Time and space appeared at a stroke at this "Zero moment". Then the Universe started its expansion during which it has never stopped growing and cooling. Time: Ten raised to the power of minus thirty-fifth of a second Inflation The Universe experienced a period of inflation right after its birth, during which time it grew from the size of a pinhead to the size of our Galaxy tenfold. Time: 1 second to three minutes Primary nuclear synthesis One second after the Big Bang the first atomic nuclei of deuterium (heavy hydrogen) consisting of one proton and one neutron emerged; then the nucleus of helium containing two protons and two neutrons; and finally lithium with three protons and four neutrons. Time: 300,000 years The first atoms The temperature dropped to 3000o C approximately 300,000 years after the Big Bang. It was low enough to enable electrons to stay with the nuclei and thus create the first atoms. Photons, which up to that moment had mainly interacted with electrons, could now propagate freely and create "the relict radiation" or "the radiation of cosmic background", which is still visible today. Time: 1 billion years The birth of the first galaxies The first galaxies probably arose approximately one billion years after the Big Bang. The contractions of gas clouds and dust due to gravity effect enabled the formation of stars. Time: 10.5 billion years The birth of the solar system A contraction of a gas cloud enabled the formation of the solar system 4.5 billion years ago. Time: 15 billion years Present time The Universe is mostly empty today, dark and cold. The medium temperature of the background radiation, which floods the Universe", is about 3 K (-270o C). Quotation: The beginning of time falls to the evening of that night which preceded the 23rd day of October 4004 B.C. (Bishop James Ussher 1611) Text: THE CREATION OF TIME IN CULTURES AND RELIGIONS OF NATIONS The early Christianity did not only inherit the Old Testament, but also the Greek tradition of Socrates´ exploration and conviction that all inquiries may be answered based on the strict intellect. They had been interested in the issue of the creation of time for millenniums. The core of the question asked by the church was: if God created the Universe, had He created it in Time or had He had to create a matrix of space and time before creating the matter? The main issue was the sequence of events in connection to the introduction to Genesis. After all, if God created the Universe on 19th March, time could not come to life on its own accord before 23rd March, when God created the Sun. There had been no time, not even an hour, before the creation of the Sun, as there was nothing to make the shadow enabling measuring the time… After centuries of excited debates, the 4th Lateran Council introduced in 1215 the official ecclesiastical doctrine stating that "God created all things spiritual and material, heavenly and earthly together and out of nothing". Another issue was to state when exactly the Universe had been created. Greek and Roman philosophers believed in a planet and star constellation special for the beginning of time. This configuration was known as "thema mundi", the theme of Universe, and it was depicted as a horoscopic table with zodiac signs placed in the moment when the Universe had been created. The structure of such a table differed according to different religions and cultures. The cultures which opened their religious year in spring believed that when the Universe had been created, the Sun stood in the Aries sign. Those, who opened their year in summer, had Leo in their sign. Illustration: Biblia Vulgare Istoriata Caption: In the early days of the printed bible the first chapters of the book of Genesis present in the form of a "comics" the sequence of events – the creation of Heaven and Earth and light, the creation of water, the creation of flora, the creation of Sun, Moon and stars only after the creation of Human. The central figure is God. The rhythm and sequence of the pictures follow from the presumption that time passes, events develop in time, and everything that exists is the evidence of God's will, nothing exists purposelessly. Illustration: Babylonian, the table of creation, burnt clay Caption: The cultures which developed in a complicated, or even hostile environment, often see the Universe as something dangerous as well. Their cosmos is significant for constant conflict between antagonistic powers. The role of the Human is to support gods in their struggle in the hope that the god's satisfaction will lead to the survival of humankind. This is typical for cultures controlled by repeated rituals. The main deity of old Mesopotamia was Marduk, who defeated the powers of chaos and anarchy in a fight. The main part of the cycle of cult celebrations, especially those around the Mesopotamic New Year, comprised of reminiscence of Marduk´s struggle. The king always took the part of Marduk. If the king could not or did not want to participate in the ceremony, the New Year's arrival was postponed. The time in the kingdom stopped. Illustration: Australia (Djambarrpuingu clan), Maori (Pare or door ornament) Caption: Both the Australian Aborigines and Maori believe, that history survives alongside the present. The past is an active element which explains why things are what they are. The history of the creation of the Universe is solid reality which shows people how to live at present. The past is a live part of the present and the future. The expression used to describe the past can be translated as "time is before us". The right wall of the room The right wall – alcove 1 Text: The Universe The Universe is all the matter, energy and space which exist around us. There are planets, stars and galaxies, dust and gas among starts, as well as light which travels through space. There is a proof that the universe has a particular structure. Planets orbit stars. Billions of stars gather into galaxies. There are over 100 billion galaxies in the Universe. Most of them are found in clusters. Clusters gather into bigger groups called super-clusters. And finally, superclusters gather into gigantic areas belonging among the greatest parts of the Universe. Galaxies Stars and planets circulating them gather into galaxies, which are the essential keystones of the Universe. Galaxies comprise of billions of stars. Cluster Cluster usually contain several hundreds of galaxies. Our galaxy, Milky Way, is a part of a little cluster called the Local System, housing about 30 galaxies. Super-cluster Super-clusters are huge groups of up to 20,000 galaxies. The modern view of Universe organisation originates in the year of 1924, when American astronomer Edwin Hubble proved that our galaxy is not isolated in the cosmos and that there is a number of them. He also discovered that most galaxies recede from us, and the further they are, the faster they recede. This means that the Universe cannot be static, but expanding. The distance among galaxies increases together with time. Illustration: Photo The Cosmic Sky, 3D cube The right wall – alcove 2 Text: GALAXY The matter in the Universe is split unevenly. It concentrates into huge complexes of starts, gas and dust, that are called GALAXIES. They contain tens to hundreds of billions of stars. Galaxies were formed shortly after the birth of the Universe and they hold together due to gravity. They travel the Universe and some might even hide extraterrestrial life. They differ in shape. They are round, oval, spiral, or of an irregular shape. They can be spotted in the sky using a telescope. Our galaxy is called Milky Way and the Sun appears in one of its spiral shoulders. The stars are force to orbit the Sun in the same manner as they are forced to rotation around the centre of their galaxy. Galaxies were discovered in the 20th century when American astronomer Edwin Hubble showed that "extragalactic nebulas" are in fact vast agglomerations of stars, similar to Milky Way, outside our galaxy. The closest galaxy outside Milky Way is a dwarf galaxy in the constellation of Sagittarius, approximately 60,000 light years distant. Light year is the unit of distance. It presents the distance travelled by light in one year, that is 9,460 billion kilometres. The distance of the Sun from the centre of Milky Way is approximately 30,000 light years. The disk of Milky Way measures about 100,000 light years in diameter and its thickness is 1,000 light years. Milky Way Our galaxy is in the form of a disc and comprises of about 150 billion stars. It is a spiral galaxy. Illustration and graphics: Milky Way Photo: Spiral galaxy Spiral galaxy with a division Elliptical galaxy Irregular galaxy Right wall – alcove 3 Text: THE SOLAR SYSTEM The solar system is the nest of planets and other objects belonging to the galaxy called Milky Way. It represents an infinitesimal part of the Universe. There is the Sun in the centre of the system orbited by 9 planets (maybe 10 today), 63 moons of the planets, 6 big planets, tens of thousands of tiny planets, comets and meteors. Among them, a great number of dust and gas particles flow. The strong gravity force of the Sun holds the whole system in one place and does not release any object. How did the solar system come into existence? Ages ago, particles of dust and gas started to gather. 4.6 billion years ago, a huge dust-gas cloud arose. The cloud became compact due to an explosion of a nearby start – supernova, and started to move. Particles of dust and gas form whorls rotating around the dense and material centre of the cloud. The temperature in the core of the cloud started to increase, which initiated a thermonuclear reaction. In less then one million years a new star was born – the Sun. the residual gases and dust clustered, started to orbit the Sun, to collide with each other and to connect into bigger pieces of matter. They formed into bigger and bigger objects due to the activity of the gravity and finally into whole planets. Illustration: Solar System TEN/NINE PLANETS The Solar System contains 9 (or maybe 10 today) planets, including the Earth. Mercury is closest to the Sun, then Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. The planets orbit the Sun basically in the same level as the Earth. Most orbitals are round, some are elliptical. All orbit the Sun in the same direction and all, except Venus, rotate their axes in the same direction. While Mercury, Venus, Earth and Mars are little rocky spheres, Jupiter, Saturn, Uranus and Neptune are gigantic gas spheres. The only exception is Pluto. It is related to the rocky planets and as it arose far from the Sun, it contains a great amount of ice. It resembles comets. The greatest planet: Jupiter, 139,822 km in diameter. The smallest planet: Pluto, 2,274 km in diameter. The planet with the greatest number of moons is Saturn, there are 18 moons. The densest plant is Earth, the average density is 5.5 times greater than water. The planet orbiting the Sun in the fastest speed is Mercury, the speed reaching 172,408 km/hour. The planet with the longest day is Venus, one day lasts 243 terrestrial days. The warmest planet is Venus, the average surface temperature reaches almost 500o C. The coolest planet is Pluto, the freeze reaching up to –238o C. How big is the Solar System? Scientists measure the distances in our Solar System using astronomical units (AU). One AU equals the distance between the Earth and the Sun, which is approximately 150 million km. For example, the distance between the Sun and Pluto is about 40 AU. Illustration Caption: To understand the distances between planets you only need 10 friends and space of 30 m. One friend is the Sun, the others are "planets" in appropriate distances. 31 cm distance of Mercury the friend from the Sun the friend is in fact 58 million km. Exhibit: 3D illustrative planetarium – a model of the Solar System. Left wall – alcove 4 Text: STARS Stars are great spheres of hot gas, whose energy comes from nuclear reactions proceeding in their core. They are other suns and they have many features in common with our Sun. they contain 75 % of hydrogen, 20 % of helium and 5 % of other elements. Their structure is identical: there is the heart in the centre, where the temperature is highest. The cores of hydrogen atoms collide there, which gives rise to a great amount of free energy radiated in the form of light. Stars differ in their brightness, colour and mass. The colour of stars corresponds with their surface temperature. The more energy the star produces, the warmer the surface, the bluer its colour. The surface temperature of the Sun is almost 6,000 degrees centigrade, the temperature of other stars varies between 2,500 (red colour) to 50,000 degrees centigrade (blue colour). The mass of stars varies according to the conditions in the time of the star's birth. The mass of smaller stars is about 7 % of the Sun mass, which is the minimum needed to ignite the star, to start the combustion of hydrogen in its core. More massive stars are destined to produce much more energy and consume their supplies more quickly. Their existence is bright, but short. More modest stars shine less, are less warm, but exist much longer. Illustration: The starlit sky map Caption: The starlit sky map, northern and southern hemisphere. Some stars or constellations are visible only at certain time or in certain season of the year. Their visibility depends on the latitude where the observer finds him/herself. The stars positioned near the poles remain visible throughout the year. CONSTELLATIONS Constellations are artificial groupings of stars. Seeking the meaning of things, people changed certain light points in the sky into a dreamt-up world. They joined the stars with imaginary lines and assimilated them to animals, mythical heroes, or various objects. The ancient Greek named 48 constellations and their successors added 40 more. The ancient nations found observing the stars highly amusing. Seafarers used stars to navigate their ships and scholars used to use stars to foretell the future. Illustration: The map of Stanislav Lubienski from 1665 A. Durer: The northern and southern star hemispheres ZODIAC The twelve main constellations form the zodiac. The orbit of the Earth around the Sun coincides with the imaginary ecliptic line which joins these 12 constellations. As the Earth orbits the Sun, the Sun is projected into a certain constellation of the zodiac. It is a different constellation each month and thus the zodiac signs arose. Illustration: The Sun and the zodiac constellations Do not mistake astrology and astronomy! While ASTRONOMY is a science concerning the Universe, its origin, development and structure, ASTROLOGY is star divination, which concerns in finding relations between the momentary position of the Sun, Moon, planets and stars, and past, future and present actions on the Earth. Although it uses observations and knowledge of astronomy, it is above all the art of interpreting the discovered relations. Its essential the belief, that the Universe is a whole, where each of its parts in mutual, reciprocal, and direct connection with the other ones. The word astrology originates from the Greek "star" and "science". Many ancient cultures used astrology to explain strange phenomena and to foretell the future using the positions of stars and planets. Illustration: Silvio Belli: Libro del misurar con la vista 1569 The Zodiac Exhibit: 3D globe of the starlit sky Left wall – alcove 5 Text: MOON The moon is our closes cosmic body. It orbits the Earth and its gravitational force causes the high tide and the low tide. The moon, unlike our planet, is waste with no atmosphere. Its diameter is 3,475 km and represents 1/81 of the Earth's mass. The surface temperature of the Moon oscillates between 115o C in the Sun during the day and –170o C in the shadow. The surface of the Moon is covered by craters created by falling meteorites, little planets and comets. The Moon has only one sixth of the terrestrial gravity, so that a human weighing 70 kg on the Earth would only weigh less than 12 kg on the Moon. The Moon can be seen in the sky in various day and night times. It is not itself the source of light, it only reflects the sunrays falling on its surface. The Moon always shows the same side on its round orbit around the Earth. Moon and month The changes of the Moon can be observed in a bright night sky. Its complete cycle is less than 30 days, which is called the phase of the Moon. The Moon is totally invisible at the beginning of its phase – this phenomenon is called the new moon. The Moon then seemingly grows during the next two weeks, and it can be observed as a whole during the full moon. Then the process reverses and the Moon starts to ebb… The period between two full moons has always been called a month. A month is the period of time the Moon needs to orbit the Earth once. Ancient civilisation based their lunar calendars on the lunar cycle. Almost all the most ancient calendars were lunar. The more perfect solar calendar developed from them; it consists of 12 months of approximately the same length, which are always slightly longer than the interval between full moons, the exception being February. The Moon as a means of timekeeping exceeded the Sun. Illustration: Lunar phases Map of the Moon Exhibit: 3D model of the Moon Illustration: Footprint of an astronaut on the Moon Illustrations from some Jules Verne books, such as The Voyage to the Moon Text: One of the oldest human dreams – to step on the Moon – came true in 1969. The first people to step on the Moon surface were American astronauts Armstrong and Aldrin. The footprint of the astronaut's boot will remain on the Moon surface for millions of years. The Moon has no atmosphere and no wind is blowing there to wipe it off. Left wall – alcove 6 Text: EARTH The earth is the planet of life. It arose 4.6 millions years ago, as the other planets. There is a red-hot solid core in the centre of the Earth consisting of mainly iron and nickel. The core is surrounded by the mantle, a hot and thick layer of rock, mainly silicon compounds. There is the crust above the mantle torn to pieces called tectonic plates. These plates shift by several centimetres annually, they touch, they hit each other, and all this causes earthquakes or volcanic eruptions. During tens or hundreds of millions of years these shifts have been caused the elevation of mountain ranges in the areas where the plates overlap and compress. Two thirds of the Earth surface are covered with water. Oceans are the storages of energy. They accumulate heat from sunrays and release it again according to their rhythm. Thus they significantly influence the Earth climate. They transfer the solar energy gained in great amounts in the equatorial areas to the polar areas and thus they contribute to balancing the temperature in various latitudes. The presence of water in liquid state and the excellent climatic stability of the Earth enabled the formation and development of living organisms, first in the oceans, and then on the dry land. These life forms documented since the year 3.5 billion gradually changed the face of the planet by creating a new kingdom called the biosphere. The living organisms began to use photosynthesis, the most important biochemical process on Earth, to gain carbon directly from atmospheric carbon dioxide dissolved in water. Thus they gradually enriched the atmosphere with oxygen, which is a unique element in the Solar System. The first life forms appeared on the Earth 3.8 billion years ago. These were very simple unicellular organisms. The era of dinosaurs arrived only recently – approximately 250 million years ago. The Earth is characterised by another extraordinary phenomenon –activities of the humankind. The first homo sapiens began to walk on the face of the Earth approximately 200,000 years ago. The huge development of the human civilisation amazes today with its intellectual performance and development of all scientific fields. On the other hand, the intensive industrial production, creation of artificial environments, increasing consumption and balancing on the edge of sustainable development leaves bigger and more negative traces that are noticeable in the chemical composition of the atmosphere, soil, water and many living species, including the humans. One of the vital issues of the 21st century is the issue of responsibility for the future of the planet Earth. Basic data about the Earth Location: the third planet from the Sun Average distance from the Sun: 150 million km Orbital speed: 107,245 km/hour Mass: 6 quadrillion kg Major atmospheric gases: nitrogen and oxygen Moons: 1 Length of the day: 23 hours, 56 minutes, 4 seconds Length of the year, 365 days, 6 hours, 9 minutes, 9,5 seconds Illustration: A random "terrestrial" collage. Nature, flora, fauna, human, technology, diversity of the planet. Exhibit: 3D geographical globe. SEASONS OF THE YEAR The angle between the equator and ecliptics is 23.5 degrees. In other words, the Earth rotates in a position under the angle of 23.5 degrees – this deviation causes the existence of four seasons of the year. As the Earth orbits the Sun, the sunrays hit the near-side hemisphere, and there is summer. There is winter on the far-side hemisphere. Before they started to use a clock to follow the time, people oriented according to events regularly repeated in the nature – the seasons. The number of seasons known by the civilisation depended on the climate and the use of astronomical data. The ancient Greece originally knew three seasons – winter, spring and summer, which was characterised as cold, humid and dry. As soon as the human had learned to read the sky and discovered the regular sequence of the summer and winter solstice, the spring and autumn equinox, which divide the year into four equal segments, there appeared the convention of the four seasons. However, there are areas, where seasonality is perceived differently. The nations living along the equator know the dry and the wet seasons. The area of the Upper Nile in Sudan divides the year into two halves: rain and drought. The tribes stay during the rainy season (March to September) in settlements and engage in rituals and ceremonies. During drought (October to February) they migrate to temporary camps, men hunt game and fish. The dry season is the period of movement and migration, the rainy season is the period of consolidation and ceremonies. A lay observer of the life of people above the Arctic circle might say that there is only tough or milder winter. And yet, the Eskimos know nine seasons. March and April are called avunniit, i.e. "the period of prematurely born seals", May is nattian, i.e. "the period of normally born seals", June is tirigluit, when "bearded pups of seals" are born, the next three summer and early autumn months are aggaruut, when "reindeers lose coat", October is akullirut, "the reindeer coat grows thicker", etc. The original inhabitants of Australia in the area of Cockatoo have five seasons. Various cultures may have various cyclic rhythm given by the specific local cycle of nature, work, rituals and habits. Illustration: Loosely interpreted four seasons The front wall of the room, where the middle of the three windows would be blinded. Both side windows would be shadowed by blinds disabling transmission of light that would be used for art purposes. Thus the problem of air-conditioning would be solved and the necessary presentation space would be gained at the same time. There will be a light source in this part, which will evoke an illusion of sunshine. It will penetrate the centre of the room via the obelisk and the theatrical stylisation of Stonehenge and cast a shadow to present the ancient idea of timekeeping. The front wall Text: SUN The SUN, similar to the other stars, is a huge sphere of red-hot gases. The light and the heat – shining energy – are created in the core of the Sun, a sphere of 250,000 km in diameter, where the temperature is about 15 million degrees centigrade. The hydrogen atoms collide and join to create helium. This is a thermonuclear reaction during which a vast amount of heat is released. A great number of photons arise during this reaction. Photons are indivisible particles of light energy. It takes 10 million years for one photon to travel from the core to the surface of the Sun. Only 8 more minutes suffice for the photon to reach the Earth. The sun light that we can see was then created approximately 10 million years and 8 minutes ago. The personification of the warm Sun as a kind and benign deity, healer, provider, and friend of the human is universal in all cultures and civilisations on the Earth. That is, there would be no life on the Earth without the SUN. SUN: Temperature: 6,000o C on the surface, 15,000,000o C in the core Mass: 2,000 quadrillion tons, i.e. 109 diameters of the Earth Gravity: 28 times higher than on the Earth; a human weighing 45 kg would weigh 1,270 kg on the Sun Luminosity: 390 trillion megawatts, which equals 90 billion megaton hydrogen bombs exploding every second. Illustration: The Sun Section through the Sun Captions: The Sun core 600 million tons of hydrogen change into helium each second. 4 million tons of matter simultaneously turn into energy. Convective zone Here the energy is released by emitting photons. The temperature is lower than 2 million degrees centigrade on the edge of this zone. Radiation zone A layer of 200,000 km. The energy here is transported to the surface of the star, to the photosphere. Photosphere The shining surface of the Sun, where the temperature decreases to 5,800 oC. Chromosphere The zone above the photosphere, 2,000 km thick. All eruptions and protuberances take place in this layer of the solar atmosphere. Red-hot gases blaze as high as 9,000 km. SOLAR YEAR Observing the Sun was wan of the ways of recording the changes of the year. The Sun appears lower in the sky in winter than in summer when it remains longer in the sky and gives more daylight. People were able to follow the changing seasons according to the amount of daylight. They realised that the Sun rose in different places according to the annual progress. One year is the period of time needed for the Earth to orbit the Sun once. ORBIT OF THE EARTH AROUND THE SUN The iconographies of gods of the Sun have been miraculously consistent in the West and the East of our planet since the ancient times up to today. The Sun God is usually male and often eternally young. He is the companion or brother of the Moon. He is depicted in a solar equipage pulled by two or four horses with light rays radiating from his head. The Babylonian mythology depicts the Sun god, Shamash, in a position similar to the divine pantheon of the Roman-Greek god Apollo. He is not the most powerful god but belongs into the heavenly triad together with the goddess Astarte (planet Venus) and Sin, the Moon god. Shamash also drives his heavenly equipage as Apollo, every day in the sky. The earliest Vedic texts in India depict a picture of Suryo, the Sun god, driving the heavenly equipage. The Sun god and the Moon were married in the Chinese mythology. They impersonated the duality of the Universe, the Sun being yang, the male element, and the Moon being yin, the female element. They both become immortal. Although the Sun in the source of all life on the Earth, we will not be surprised to find out that the Sun plays only a little part in the pantheon of the Northern gods, as people from the Nordic nations must do without daylight for months. The Eskimo worship the main heavenly god, the male spirit of the Moon, called Tarqueq. His responsibilities are fertility, morality, and animal migration. FROM THE GREEK MYTHS… Gods and heroes of myths emerged from human fantasy. Their fate is interesting. Although they never really lived, they survived real heroes and famous personalities of history. THE SUN GOD The Sun god in the Greek mythology was Helios. With his huge body, golden hair and crown made of rays, he represented a true impersonation of the Sun. he lived on the east shore of Ókean in a wonderful palace he left every morning in a golden equipage pulled by four winged horses to travel the sky. The poured his rays on the Earth giving it light, warmth and life. In the evening he descended back into the waters of Ókean in the West. There he was awaited by a golden boat, which carried him back to his palace only to start the same pilgrimage the next morning. Helios had seven herds of cows and seven herds of lambs, each with fifty animals. They were the symbol of 350 days and 350 nights (the Greek year had 50 weeks with 7 days). Helios was a very respected god. The Greek made many of his statues. The tallest made in 281 B.C. on the Isle of Rhode was 35 meters tall and stood at the entrance into the port of Rhodes. The Colossus of Rhodes had been considered one of the seven wonders of the world, it fell, however, a victim to an earthquake in 225 B.C. The Rhodes statue of Helios had been famed for being the tallest statue of the world for 2,000 years. It was surpassed by the New York Statue of Liberty only in 1886. Illustration: either the metope "Helios with a four-in-hand", discovered in the ruins of Troy by Schliemann, or the Colossus of Rhodes (a fantastic depiction or scene on a Greek vase). SON OF THE SUN GOD Phaethon is the son of the Sun god in Greek mythology. He insisted that his father Helios lend him the solar equipage for one day. Helios resisted for a long time, worried, that his son would not manage the horses. Finally he fulfilled his son's wish. Phaeton's ride ended catastrophically. The horses discovered that they were not conducted by the firm hand of the god and left their everyday route. First they flew high to the Scorpio and Taurus constellations, but when they approached the Centaur they got scared of his drawn bow and flew low towards the ground. Their heat made the waters of the rivers of Euphrates, Istros and Tiber boil. The Nile fled to the end of the world and hid his spring there. The flame of the low-flying equipage burned the fertile panes of Arabia, Nubia and the Sahara and turned them into a barren desert. The skin of the inhabitants of Africa was burned so that it remained black forever. The heat started to dry the seas and crack the soil so that the empire of Aides the God opened. At that very moment Gaea, the mother of the Earth, called upon Zeus to put an end to it. Otherwise the world would burn, the skies would collapse, and everything would turn into the former chaos. The top god knocked Phaeton into the depth with a thunderbolt. The story of Phaethon has been described by many artist where he has been depicted as a symbol the human desire to reach distant aims rather than an ambitious man. Illustration: a passage from Metamorphosis, Ovidius, or an illustration from an antique vase The central space STONEHENGE There will be a scenic, theatrical stylisation of STONEHENGE in the central space of the room. Also place a real photograph of Stonehenge. Text: One of the most remarkable constructions in the world is without question Stonehenge in Central England, approximately 130 km west of London. The circular structure assembled from huge standing stone megaliths, each weighing 25 ton, with stones hanging across them (henges), has been standing on the Salisbury Plane for approximately 5,000 years. Its purpose is still dispute today. Was it a religious, church spot, a burial ground, the place of cult meeting of hunters from the Bronze Age, or a defensive system? Was it an observatory used by the tribes as a primitive timekeeper? The observatory and calendar versions are among the most popular ones, but also the most widely controversial. The wide path leading the inner system of five "trilithons" forming the shape of a horseshoe, runs to the stone gate called Friar Heels, over which the Sun always rises on the day of the summer solstice. It can mean the beginning of an ancient tradition, the beginning of a seasonal cycle by marking the spot where the Sun is found in a certain moment in the horizon. In the 1960 astronomers who studied the ruins thoroughly uncovered more evidence of observing the heavenly bodies which had deliberately been encoded into its architecture. Each one standing in the right spot inside the stone circle can witness directly the time shift. Similar to records engraved into animal bones, the standing stones may also record the cycle of events in the nature (an observer who knows the code). This would mean, that this construction may have had the role of both an observatory and a calendar. ROOM 112 (34 m2) NIGHT AND DAY – CALENDARS The smaller room to be designed in contrast day – nigh, light – shadow using an inner light regime. For the presentation to use also the area of 2 windows by covering them with a blind similar to the Clipole system. Design elements of the Sun and the Moon. The front space – text: NIGHT AND DAY Text: LIGHT AND DARKNESS The regular rotation of day and night influenced the first ideas of time. Even the rhythm of the nature corresponded with the rotation of light and darkness, the seasons of the year, and the rotation of work and rest. Day and night, just like the natural cycle and the movements of heavenly bodies entered the awareness of people as basic elements of time. The Sun and the Moon were the great heavenly clock. The rise and set of the Sun determined days and nights, the ebbing and growing of the Moon then the course of a monthly period. The cycles of these two heavenly bodies were used to measure time as early as 10,000 B.C. periods such as day, month, or year reflect the astronomical cycles that create the base of most calendars. All calendars are based on observations of heavenly bodies and the use of natural cycle whose regular rhythm is understood at the basic unit of measurement. It is all about mainly three astronomical cycles: Rotation of the Earth around its axis, which determines the length of the day The Moon orbiting the Earth, which determines the lunar month The Earth orbiting the Sun, which determines the year NIGHT AND DAY There are only few aspects influencing our lives more than rotation of day and night, light and darkness, sleep and wake. The beginning and end represented the ancient problem of dividing the day and night. The Egyptian and the Roman started their day at midnight, the new day started with the sunrise in Babylon, Persia, and Syria, and with the sunset in Judea and China. The Arabian welcomed a new day at high noon. A specific time interval and its formulation were connected with a particular activity, rather than a mechanical abstraction. Thus for example, late afternoon (5 – 6 o'clock) was the time when "the cattle returns home". It was the need of homogeneity rather than preciseness, which lead the Babylonian to a rational way of limiting and denoting time. The time between the sunrise and sunset, the beginning and end of a day, was changeable, and the period of night was similar. Dividing the day into 24 hours probably originated in dividing the zodiac into 12 equal parts, each of them being limited by a star constellation through which the Sun travelled during on lunar cycle. And as it takes the Sun 360 days to travel the relative annual cycle through the star system, thy system of dividing the seasonal time into intervals divisible by 6 and 12 is at hand. And so the sexagenary notation with 60 minutes to an hour, 60 seconds to a minute, and 12 hours to a day became part of measuring the time. The circle, which represents the movement of the Sun on the sky trajectory, was divided into 360 degree in space. The Roman connected day and night into one time unit, which started and ended at midnight. Although this first artificial time system was not really practical, it was rational and equal. It had been used until the Middle Ages, when the mechanical clock was invented. Text: CALENDAR – THE INSTRUMENT OF SOCIAL LIFE The Mayo, Aztec, Gaul, Greek, Roman, Chinese, Jewish, Copt, Moslems – they all had and have calendars. The necessity to organise time is common in all societies indiscriminate of race and religion. To live together, people had to create a unified time frame, which enabled coordination of human activities. The calendar, a system of dividing time into days, months, and years, based on astronomical cycles, corresponds with basic life requirements and needs. It spans the cosmic time and time lived by every individual on the Earth. It creates social time comprehensible to everyone. The calendar fulfils two functions: it gives time the rhythm and provides instruments for its measurement. The rhythm is given by the structure of the calendar, distinguishing workdays, holidays, celebrations, and founding traditions. It also creates a symbolic connection among the members of the society. Each society has its own calendar, which represents its identity. Measuring the time is a more demanding, objective task whose job is to determine exactly the time intervals, such as the length of a year, months and days. In other words, to measure time means to establish an order based on selected, repetitive events, and to obey this order. The calendar enables us to orientate in time, it limits the present precisely, it separates us from the past and enables us to plan the future. The word "calendar" is derived from the Latin "calendaria", books of accounts, where settled debts were recorded, and also from the word "calendae", the first day in a month when the Roman settled their debts. Text: CALENDAR SYSTEMS The essence of each calendar is natural and astronomical phenomena such as rotation of day and night, the changing phases of the Moon, and the rotation of seasons. The basic units of time derived from these periodical phenomena were the major quantities giving the base to the calendar system. One of the main reasons why calendars emerged was prediction of regular natural phenomena and figures. An agricultural society needed a solar calendar to know when to sow and seed. A fishing society needed a lunar calendar, which denoted the time of influx. The present calendar follows from the so-called tropical year whose length is derived from the time interval between two subsequent entries of the Sun into the spring equinox. This lasts 365 days, 5 hours, 48 minutes, and 46 seconds, but as the rotation of the Earth is gradually slowing down, the tropical year loses 5 seconds every 1,000 years. Lunar calendar The first calendars were lunar. It was easy to distinguish the lunar phases according to the changes in the shape of the Moon. It was possible to state an approximate equivalent of the solar year: 12 lunar months corresponded roughly with the seasonal cycles. The basis of all lunar calendars is the time interval between two successive same phases of the Moon, the socalled synodic month. Its length is 29.5 days (29 days, 12 hours, 44 minutes and 3 seconds exactly). The Babylonian started to use the lunar calendar. The lunar calendar had already been used by the Summers as early as 5,000 years ago and had been taken over by Egypt, Greece, Rome, and China. The best-known lunar calendar today is the Islamic calendar. Astronomical measurements had always been an area where the Arabian excelled. The Islamic calendar was officially recognised in 634. It consists of 12 months, which consist of 29 or 30 days. The Islamic area, such as Algeria, Pakistan, Indonesia, or Morocco still use the lunar calendars with an 8-year or 30-year cycle. Illustration: An Islamic calendar Text: The lunar years are united into 30-year cycles containing 19 years of 354 days and 11 years of 355 days in the Islamic time. The Islamic and Gregorian calendars are settled every 34 years. Text: the Koran, Sura Jonah 10:5 Solar calendar Solar calendars divided time according to the movements of the Sun (in reality according to the orbit of the Earth around the Sun) and were inevitable for agriculture, which required division of a year into seasons according to a strict order. It was necessary to synchronise working the land with the seasons, to seed according to the presumed rainfall, and to make food storages between the harvests. The oldest known solar calendars made 6,000 years ago are Mayan and Egyptian. The Mayo had two calendars, a religious one (tzolkin) and a social one (haab), both based on the vigesimal system. The religious calendar had 260 days, the social calendar had 360 days. The year was divided into 18 seasons of 20 days each. 360 days made "tun". Every day had a name. Five additional days were empty days or the days of illusion, days of misfortune, and had no name. The most important time unit of the Mayo was the tzolkin, a cycle of 260 days, 9 lunar seasons from the conception of a baby to its birth. The Mayo recorded regularly the missing days in a year and thus they kept the calendar in a perfect accord with the solar cycle. Their solar calendar excelled by its great accuracy, though they had no reliable astronomical instruments. The Egyptian contributed greatly to the progress in understanding the time. Their calendar containing 12 months of 30 days each had months with three big weeks of 10 days and months with six small weeks of 5 days. The year according to this calendar had 360 days divided into 3 four-month periods according to agricultural seasons – the Nile floods, seeding and harvest. Exhibit: a gypsum casting of the Sunstone of the Aztec. Text: The Aztec sun stone form the year of 1479 depicts the cyclic concept of time. The Universe, which had been created and destroyed four times, depended on the Sun whose sky trajectory is conditioned by sacrifices. There is the Sun in the centre of the stone, which represents the contemporary world. There are the four past and destroyed worlds in the four corners. There are 20 signs of the calendar and the cycle of the Universe in the circle around the central motif. Illustration: the Dresden codex, a rare codex gives evidence of the astronomical preciseness of the Mayo Lunar-solar calendar Solar calendars were suitable for migrating and littoral societies, but did not suit the planting cultures as they did not know seasonality. Therefore there were attempts to adjust the lunar calendar to the solar year. The lunar-solar calendars had to fulfil the basic requirement: the beginnings of the calendar months had to be as close as possible to the new moon (new moon – the phase of the Moon when the Moon is invisible, it turns its unilluminated face to the Earth) and at the same time the sum of the number of the whole lunar months had to correspond with greatest possible precision with the length of the tropical year. To fulfil this requirement it was necessary, that the rotation of lunar phases corresponded with the annual movement of the Sun. the theory of these calendars was based on two quantities – the tropical year and the synodic month. Meton, a Greek astronomer (the 5th century B.C.) discovered, that 19 solar month corresponded almost precisely with 235 lunar months. As 19 lunar years have 228 months, it was necessary to add 7 months to 19 lunar years and thus harmonize the lunar and solar calendars. The Jewish used this idea in the 4th century to create their lunar-solar calendar. For religious reasons it was necessary to adjust the lunar calendar to the rhythm of the seasons. The Pesach feast had to be placed at the beginning of spring, to commemorate the exodus from Egypt, which corresponded in time with the spring feast of non-fermented bread. As soon as the months grew out of the seasonal sequence, barley, which was inevitable for the Pesach feast, would not mature. Therefore they performed an adjustment by doubling the last month of the year. In 359 Rabbi Hillel II decided to reform the calendar so that all the Jews living in the Diaspora could celebrate their feasts at the same time. The Babylonian and the Chinese also used Meton´s discovery to create their own lunar-solar calendars. Illustration: the Omer calendar Text: the Jewish calendar is characteristic for a number of religious feasts The wall right and left of the entrance into the room Text: There was a totally different date in the calendars of many other nations in the first seconds of 1st January 2000 when the celebrations of the new millennium according to the Gregorian calendar started: 19th December 1999 according to the Julian calendar 23 Tebeth (4th month) 5760 anno mundi according to the Jewish calendar 24 Ramadan (9th month) 1420 Hijra according to the Islamic calendar 25th day of the 11th month in the year of rabbit and the 16th year of the present 60-year cycle according to the Chinese calendar 25th day of the month of Margasira in 1921 of the Saka era according to the Hindu religious calendar 11th day of the month of Pausa in 1921 of the Saka era according to the secular solar Hindu calendar. Although many nations have kept their traditions of time measurement and calendar, the Gregorian calendar is accepted or tolerated as a global, worldwide time framework and system which travels across the cultures and serves the international relations as well as economics. Hundreds of books have been written about the time and its measurement in the cultures of various nations, and still we perceive this theme only from the viewpoint of one civilisation figure whose common denominator is the European renaissance. However, if we go further into the history when seeking our common time and identity, we must travel east where the Babylonian and Greek invented together the logical mathematical way of understanding the nature. We must look into China where we borrowed many technical inventions and procedures, which are still used today. We must also turn to the northern shore of Africa to understand the significance of Islam and the Arabic world for our quantitative mathematical development. As can be seen, our present identity has been formed by elements of various places and times. The differences we can see in the Arabic world, in the distant mountains of Peru, in China or the Arctic areas soon vanish when looked at and perceived more closely. One of the many common denominators and bonds which connect us on this planet is the indestructible bond of time. The wall right of the entrance into the room Text: Mutual inspiration of cultures The ability and directness of transferring information and astronomical knowledge, as the sequence and consistency of depicting the heavenly bodies can inspire the contemporary world. Egypt and Babylon, two different cultures, developed different mythologies. The Greek who had conquered these territories, adopted both cultures without removing the discrepancies between the two systems. They adopted the idea of planetary gods from the Babylonian system, which was closer to their own, and also the zodiac and the system of measurement and observation of heavenly bodies. This perception of cosmic associations they then dispensed within the empire of Alexander from the Sahara in Africa to the river Gang. The Roman inherited the knowledge and traditions from the Greek and spread them further on, via the Silk Path to the Far East. To find evidence of animation of depicting the cosmic constellations you only need to compare the cosmic globe of the Greek from the 4 th century and the cosmic globe of the 20th century. There are hardly any differences to be found. Illustration: from the chapter Calendars The wall left of the entrance into the room Text: REFORMS OF THE CALENDAR AND TIME We must return to the calendar of the Roman Republic to understand the present calendar. Julius Caesar declared himself the High Priest in 63 B.C. He became a the dictator with an unusual political and religious power in 49 B.C. The calendar of that time was very disorganised. The Roman year was more than 10 days shorter than our tropical year, which showed in the growing difference between the calendar date and the vegetative changes in the nature. To align the difference, the Roman inserted an additional month between the 23 rd and 24th February every other year. This additional month had 22 and 23 days. This change, however, prolonged the middle length of the Roman year of one day. Other changes in the length of the additional month only lead to more complications. Julius Caesar who wanted to base his reign on solid bases to correct mistakes, to give the conquered nations of the expanding empire a united way of time measurement and thus to support the construction of a solid empire, decided to reform the calendar radically. Greek astronomers in Alexandria, who at that time represented the top scientific authority, constituted the new "Julian" calendar with medium length of the year of 365.25 days. Caesar introduced the four-year cycle – the first three years had 365 days and the fourth year was the leap year with 366 days. The calendar came into effect on 1st January 46 B.C. It had 12 months with denominated by names. Ianuarius, the month of Janus, the god of the beginning, Februarius, the month of the dead, dedicated to purgation, Martius, related to Mars, the god of war and the beginning of the war season, Aprilis, the month of Venus, the goddess of love (from Etruscan Apru), etc. Julius Caesar introduced a firm time architecture, later accepted by the whole Christian world. The "Julian" calendar had been valid until 1982. The exact length of the Julian calendar was 365 days and 6 hours. This was 11 minutes and 14 seconds more than the tropical year. This inaccuracy had been balanced by its simplicity and binding for most of the civilisation. The extra minutes thus, however, shifted the date of the spring equinox shifted towards the winter season within 1,200 years. As early as in the 16th century the difference had been 10 days and the spring equinox fell to the 11th instead of the 21st of March. The social year ceased to be in accordance with the solar year and the religious dignitaries responsible for stating the date of the Easter feast had a problem. The Pope Gregor XIII issued the bull Inter gravissimas on 24th February 1582 which ordered to shift the date of 10 days in October 1582 (so that after Thursday 4the October came Friday 15th October) and thus to eliminate the calendar inaccuracy. The spring equinox fell upon 21st March again and the main aim of the reform, which was stating the initial point for determining the feast – Easter, was fulfilled. Catholic countries quickly accepted the reform. Protestant countries such as England, Sweden or the American colonies remained faithful to the Julian calendar until the middle of the 18th century. "Protestant would disagree with the Sun rather than agree with the Pope," was Kepler´s remark. Orthodox churches in countries such as Russia, Greece, Bulgaria or Romania accepted the Gregorian calendar only in the 1920s. The Gregorian calendar is not accurate, either. The annual difference from the tropical calendar is 26 seconds. Since the introduction of the calendar to the present this cumulated difference has reached 3 hours and it will be one whole day in 4700. Though it seems that the Gregorian base was fragile considering the scientific calculations had been made using elementary instruments, the solution had been approximate and the reform had been declared by church dignitaries, it is still valid 400 years later and has become a universal standard. Illustration: A portrait of Julius Caesar A portrait of the Pope Text: UNSUCCESFUL REFORMS Some revolutionary movements tried to abolish the Gregorian calendars in attempt to separate from the past and start the time again according to their mostly utopian visions. There has been an example of radical attempts to erase the past and create a new history in a new era – Pol Pot´s attempt in Cambodia in 1975. The dictator declared the year zero as part of a radical change of the whole country. The brutal experiment ended with the end of the regime in 1979. Probably the most dramatic attempts to change the calendar are connected with the French Revolution. The revolutionary France used their own calendar between 1793 and 1805. The reform had three aims: to reject completely the previous regime, to introduce state nonreligious holidays and thus to create a totally new framework of life of the society, and finally to rationalise the system of weights and measures including time measurement. The new calendar was supposed to be accurate, simple and universal. Both reforms (i.e. also of weights and measures) were to be organised in the decimal system and follow from the movements of the heavenly bodies. The new system basically copied the system of Ancient Egypt (12 month consisting of 30 days divided into 10-day segments plus five days added at the end of the year. The symbolism of the calendar originated in the nature. Each day had the name of a plant, animal, or a gardening tool. The months´ names were poetic and evoked images – March became germinal (seeding), June became messidor (harvest), October became brumaire (mist). The revolutionary calendar had never become part of the culture and everyday life. People did not resign to the fact that the traditional feasts had disappeared. In the year X Napoleon Bonaparte introduced again Sunday as the day of rest and on the 15th fructidor in the year XIII (9th September 1805) the calendar was officially abolished. The Gregorian calendar had again been introduced on 1st January 1806. Illustration: The French Revolution calendar Caption: The calendar of the Republic of France established a system of new feasts. The calendar months of the Republic of France had new names. Text: CHRISTIANITY AND TIME From the cyclic to the linear time Old cultural nations remain in contact with eternity via introducing cycles into their world, the faith of reincarnation and restoration. The dominant position of cyclic time in human thinking followed form regular repetition of some natural phenomena, such as day and night, seasons of the year, or the lunar phases. The basic symbolism of ancient feasts and folk traditions such as the New Year, the regular repetition of the rebirth of nature and anniversary rituals follows from the ancient faith in the cyclicity of time. One of the human problems is the fact that time cannot be resisted, it is irreversible, it is impossible to return a moment from one's past. Mythologies, which join the time phenomena with non-time phenomena offered, liberation and escape from the influence of time. The attraction of the cyclic model lies in the perspective of reincarnation and rediscovery of people and events in successive cycles. Christianity brought interface in the time concept. The birth of Christ had a date, an exact point in time, and this fact gave a new sense to everything that followed. Time was organised according to the given axis the central point being the birth of Christ, by what was after and before. The history started to move in one direction for the Christians, from the given beginning to a clear end, which was supposed to be the Last Judgement Day. The Christian time disposed of cyclicity and became linear, unidirectional and irreversible. The cosmic symbol of circle, which had represented the eternal return of days, months and years in ancient religions, was replaced with an arrow. The consequence of the linear time concept is the image of the time arrow which points from the past into the future and indicates the sequence of events. The central principle of the faith adopted both by Christianity and Islam was the belief in the existence of a historical process, which unwound the realisation of the God's plan according to a predefined time sequence. A parallel of the theological sequence of events – creation, fall, redemption, last judgement, reincarnation – it the sequence of physical events – the order risen from chaos, the formation of the Earth, the birth of life, the birth of humankind, and death. The concept of cyclicity became relevant again at the turn of the 19th and 20th centuries during a scientific dispute of where the cosmic arrow of time is actually heading to. Illustration The central space of the room Place a stone replica of the Aztec sculpture of the rattlesnake in the centre of the room. Caption: The Mayo and the Aztec's calendar consisted of 260 days and 13 months, and each month had 20 days. The rattlesnake whose tail has thirteen segments had been ascribed a divine character. The rattlesnake belongs to common Aztec sculptural motifs. The snake is a symbol of one of the elementary components of the Aztec concept of time measurement. VMO exhibits: A paper calendar form 1672 with the Apostles. An eternal calendar "Calendarium astronomicum universale", turn of the 17th and 18th centuries Also, place in this section of the exhibition A PLASTIC RELIEF ZODIAC FOR THE VISUALLY IMPAIRED Other real exhibits in this part of the exhibition should be real calendars or their replicas reflecting the perception of the time order by various cultures. Createam has contacted the embassies of 15 selected countries requiring cooperation and provision of these calendars. ROOM 113 (67 m2) – THE OLDEST CLOCK AND TIME MEASUREMENT An armillary sphere placed in the middle of the room, in the axis of the room along both sides of the sphere there will be historical globes of the Earth and the starlit sky. Where the replicas have been purchased, the visitors will be allowed to interact. It will be necessary to secure the original globes from the VMO from contact. The second variant is placing the purchased replicas suitable for interaction into the game zone on the 3rd floor. Text: GLOBES One of the main functions of globes in the time of Renaissance, especially in the 18 th century, was to measure time. As time measurement derives from the movements of the heavenly bodies in relation with the Earth, the globe is a perfect instrument for these purposes. One complete rotation of the globe – whether earthly or heavenly – represents a diurnal rotation of the Earth. The ring on the horizon shows the sunrise and sunset and the 12 zodiac signs. The earthly globe can be used to measure the time according to the Sun, the heavenly globe is used to measure the time according to the position towards the stars. Therefore there is an hour ring on the globe placed on the line of longitude used for determining the time. Exhibits: A baroque set of earth and star globe made by Dutch astronomer, geographer, and printer Willem Blaeuw dated 1640. The pedestals are richly engraved with a floral décor. A rare piece in the set of earth and start globe is the armillary sphere of the VMO. Text: ARMILLARY SPHERE The armillary sphere served to present graphically the movements of the planets and is consisted of a system of circles. These circles represented the equator, meridians, tropics, altitude circles, and ecliptic with the zodiac, the Earth axis, the trajectories and positions of the Sun and the Moon. The armillary sphere depicted the position of start constellations and planets according to the observation location and expressed their position at a particular time moment in various coordinated systems. These instruments were constructed at the beginning as a geocentric model of the Universe, where the Earth is the centre orbited by the planets and the Sun. The geocentric model was later replaced with Copernicus's model where the Sun was in the centre of the Universe. Central caption at the front of the room viewed from the entrance: THE OLDEST CLOCK The wall left of the entrance into the room Alcove 1 Text: SPHERES AND SHADOWS The seemingly spherical area along which the heavenly bodies move had been called the spheres by the astronomers of the ancient times. The spheres had been together with the shadow cast by the Sun the essential object of observation for time measurement. The major part had belonged to the Sun movement since the very beginnings of observing the movements of heavenly bodies. The Sun ascended over the horizon during the day and screen with its brightness all heavenly bodies. Only after the sunset was it possible to observe the movements of the planets and stars across the sky. Some stars seemingly rose as set, similar to the Sun, during the day and some other one never set but travelled the circular orbit around a fixed point, the North Pole. It seemed that all heavenly bodies – the Sun, Moon, planets and stars – rotated around the polar axis with the period of approximately 24 hours. The regular movement of stars across the sky was used to measure the time at night. The ancient "star clock" was compared and checked with the horizon. Comparing the connection with the rise and set of certain stars and the rise and set of the Sun was the cornerstone of the first Egyptian timekeeping systems. The oldest timekeeping instrument was the sundial in the form of a stick stuck into the ground. The direction and shape of the cast shadow changed following the movement of the Sun in the sky. The morning shadow was long, cast towards the West, the high noon shadow was short aiming at the northern hemisphere with a slight deviation towards the South, and the late afternoon shadow was long, pointing east. This simple principle became the cornerstone of the sundial. Dividing the shadow cast on even segments became the first hourly scale. Time measurement using mostly observations of the heavenly bodies movements had survived as long as the 17th century. Illustration: the first sundial - a stick Alcove 2 Text: SUNDIAL The sundial had been the most widely spread elementary timekeeping instrument. Their function followed from the seeming daily movement of the Sun. Their invention is related to the moment when people realised the connection between the length or directed of a cast shadow and a particular time of the day. The first sundial measuring time using the length of the cast shadow was a vertical obelisk – the gnome. The Egyptian also used these obelisks to worship the Sun god. The first obelisks serving to measuring the time probably originate in the 14th century B.C. They can be seen not only in the place of their origin, such as for example Karnak in Egypt, but also in Europe (St. Peter's Square in Rome) or in the U.S.A. (Central Park in New York), where they were transported from Egypt. People in the ancient Rome also measured the time according to the length of their own shadow. The gnome in its simple form gave quite precise measurements only at high noon when the shadow was shortest. Later on, the antique and medieval clock had a scale with curves along which the shadow of the top of the gnome moved on the days of the solstice and equinox. Hours were marked on these curves. Thank to the development of science, this originally imperfect timekeeping instrument later became quite a precise clock considering their era, especially in the Renaissance epoch. The praise belongs to a number of European astronomers and mathematicians. The probably most important improvement was the uniting of a compass with a sundial. History knows a whole number of kinds of sundials, for example equatorial, horizontal, vertical, diptych, analemmatic, or polar sundials. Exhibits in alcove 2 1/ Sundial – the gnome of and ancient sundial (model scaled down by 1:100), VMO 2/ The sundial invented by Chaldys Berovs 2,600 years ago (a model), VMO 3/ An antique sundial formed by a concave quarter-sphere (a model), VMO 4/ A sundial with an oblique plane (a model), the original ca 2,300 years old, VMO 5/ An antique "ham" sundial (a model), the original ca 2,000 years old, VMO 6/ A bowl sundial (a model), the original ca 2,000 years old, VMO 7/ A whorl sundial (a model), VMO Caption: The whorl sundial also often served as a decorative pendant. The main part was a brass whorl of several centimetres in diameter with another sliding circle with a hole for the sunray. The outer surface of the main whorl is usually engraved with the initial letters of months; opposite on the inner surface is the hour scale. Before the actual measurement, the smaller whorl is shifted so that the sunray hole is positioned at the name of the respective month. The sundial is held in a position, which enables penetration of the sunray through the hole in the scale. Equatorial whorl sundials used a similar principal; their main whorl carried two more whorls crossing each other. Alcove 3 Text: SUNDIAL The sundial used to be popular thank to its simplicity, reliability, and a relative preciseness, considering the era. The greatest boom of sundials as scientific measuring instruments, as well as artistic craft works, occurred in the 16th and 17th centuries, when the top European mathematician and astronomers engaged in constructing sundials. The idea of composition and organisation of the Universe had at that time been influenced by Copernicus´ heliocentric system. Several centres of modern science had arisen at that time in Europe. Danish astronomer Tycho Brahe began to build a modern observatory named Uraniborg on the island of Hven, which posed as a model for the astronomical centre in Prague, where he was employed at the court of emperor Rudolph II. Important scientist craftsmen from all over Europe were concentrated in Prague during the reign of Rudolph II. Prague became one of the first centres of a true international cooperation. Tycho Brahe, Jost Burgi, an excellent maker of sundials and astronomical instruments, Erasmus Habermel, and Johannes Kepler, one of the greatest figures of the history of astronomy worked together in 1599 – 1601. Also Tadeas Hajek of Hajek, the significant Czech scholar and astronomer belonged in this multicultural scientific group. The Swiss Jost Burgi, who entered the services of Rudolf II in Prague, won his attention with his astronomical instruments. Other important centres were established in southern Germany, in Nurnberk, Augsburk and Tubingen. Another well-known centre of sundial production was Loewen in Belgium, where Rainer Gemma Frisius, an outstanding astronomer, worked. Among popular sundials of that era belonged the horizontal sundial, which had not only the form of an outdoors clock, but also a table clock. The clock usually had a scale of quarters of an hour, the curves of the Sun heights and folding half-axis. The diptych sundial belonged among the most popular travel clocks. They usually consisted of two equal quadrilateral rectangular plates joined by hinges and the lower board contained the indispensable compass. They were made of wood or ivory and rarely also of brass. The equatorial sundial with a dial parallel to the plane of the terrestrial equator with a halfaxis perpendicular to it were basically the simplest sundial with a regularly segmented time scale, usable at a random latitude. Exhibits in alcove 3 1/ A horizontal equatorial sundial, NTM 2/ A whorl equatorial sundial, NTM 3/ A diptych sundial, NTM 4/ A horizontal inclined sundial, NTM It must be stressed, that a whole number of non-mechanical sundials, sandglasses or wick clocks were used in other centuries (17th and 18th centuries). Exhibit: A sundial, signed Andreas Vogler, 2nd half of the 18th century, VMO Exhibit: A circular sundial, 2nd half of the 18th century, VMO Exhibit: A whorl sundial, 1721, VMO Exhibit: A universal equatorial sundial, middle of the 18th century, a VMO facsimile Exhibit: A circular sundial, middle of the 18th century, a VMO facsimile The wall right of the entrance into the room Alcove 4 (the furthest from the entrance into the room) Text: STAR CLOCK Ancient astronomers were highly knowledgeable of the star movements and they used them to measure time using instruments. One of the oldest ones was the astrolabe, as first described by Ptolemaios, a Greek astronomer and mathematician. As with a whole number of antique scientific knowledge, the astrolabe was forgotten in the medieval times by the Western civilisation speaking Latin and lost. The use of the astrolabe, on the other hand, was widespread in the Islamic countries. The astrolabe entered Europe again thank to multicultural communities in places such as Sicily or Southern Spain, where the Jewish, Arabian, and Christian cooperated and translated their texts reciprocally. The astrolabe had gradually become a prevalent astronomical instrument and had been used on the mainland, as well as on the sea voyages. The medieval astrolabes had a basic circular board divided into 360 degrees where fillings with astronomical nets, charts or maps of the surface of the Earth, compiled for various latitudes, were inserted. The astrolabe was completed with a star map containing the zodiac signs. The astrolabe measured the position of the Sun, its position above the horizon, rise and set, the length of the day and night as well. Such data could be gained observing the movements of the Moon or the stars. If the position of the measuring spot was known, time could be determined according to the measured position of the star. It is believed that Greek Hipparch discovered the way of determining time using measurements of star heights in as early as the 2nd century B.C. The methods borrowed from the Greek by the Arabian, who measured time using their astrolabes with precision of 1 to 2 minutes. Measuring the time using the method of heights had been used up to the middle of the 17th century by many astronomers, including Tycho Brahe, whose accuracy reached several seconds. Illustration: Silvio Belli: Libro del misurar noc la vista, 1569 Philip Lansberg: Astrolabium datis., 1635 Alcove 5 Text: INTERVALS Water clock While most of the ancient scientific instruments such as the sundial or the stardial measure time according to the position of the Sun or the Moon, a number of old timekeeping instruments worked without a relation to the heavenly bodies. There are liquid, sand, air, or fire instruments, which measure the time using artificial time intervals. The time interval was made by measuring a certain amount of matter flown or burned in the timekeeping device. This group of timekeeping instruments had also been through a long period of development and introduced a whole number of elements later used in the era of the mechanical clock (pulleys, funicular hinges, or cogwheels). The most numerous in this category was the water clock. The oldest equipment which measured time using stream of water was call klepsydra ("the thief of water" in Greek). There are two basic types of clock – outflowing and inflowing. The outflowing klepsydra was a vessel with a hole through which water flew out and the descending level of water was measured. The clock was first filled at sunrise and this process would be repeated several times during the day. The inflowing klepsydra was filled with water from an outer source and the increasing level of water in the vessel was measured. Some inflowing clocks had a float, which opened a draincock after the water reached a certain level. The water clock had been known by the Egyptian and the nations of the Far East; it had been greatly improved by the Greek. A simple water clock had been gradually enriched with new elements. Ktesibios, a Greek mechanic, realised the idea of transfer of power and movement via a cogwheel in a clock run by a water wheel as early as 150 B.C. Unlike the sundial, the character of a water clock allowed the development of some mechanical elements. Scheme: Ktesibius´ water clock Su-Sung realised in the Honan province, the then capital of China in 1090, a project of a pagoda system of an astronomical water clock, which was the high point of the art of water clock construction. The astronomical part consisted of the armillary sphere and the heavenly globe. This clock's speciality is a large wheel with a closed water circulation system which run the entire clock. The principal of a regulator of the pagoda astronomical clock operation represents an important connection between elementary and mechanical timekeeping instruments Scheme – illustration: The Clock Another scheme: Christiansen´s reconstruction of Su-Sung´s pagoda astronomical clock from the 11th century Exhibit in alcove 5: Archimede´s "water outflowing clock" (a model), the original ca 2,000 years old, VMO Alcove 6 Text: INTERVALS Wick and fuse clocks The rather widespread and simple interval measurement of time had been candles with a time scales since the beginning of the 13th century. They said the time and illuminated the rooms of church and secular dignitaries at the same time. Sometimes metal nails or little balls were attached to the sides of the candles, which fell of during the wax melting and thus gave an acoustic time signal. Another matter used for lighting was also vegetable oil. An oil burner clock arose from the dependency of the level to the time of illumination. A glass oil flask had a time scale and the volume of the flask was such that its volume sufficed to constant illumination between certain evening and morning time. The thickness and length of the wick adjusted the size of the flame and consumption of oil so that the decrease of oil level corresponded with the time markers. Far East countries such as China and Japan belonged among the most numerous users of oil, fire or burner clocks. The lighting substances were often perfumed and so one of the senses used to following the time was also olfaction. The exhibit is alcove 6 related to wick and burner clocks: A candle clock in a wooden candlestick (VMO) A candle clock in a tin candlestick (VMO) A Chinese fire alarm clock (a model), the original ca 1,500 years old (VMO) An oil wick clock, 18th century (VMO) Sand clock A sandglass had probably been already known in ancient Greece. The word "sand" itself is misleading, as the used material was stone dust or dust of crushed eggshells. A report from the 14th century found in France contains instructions of preparing the material from black marble sifted dust boiled in wine and dried in the sun. The advantage of the sandglass was its simplicity and ability to measure time at any day or night time. The sandglass was constructed in several minute, half-hour or hour intervals, an exception was a giant sandglass for a 12hour operation. Sandglasses, either gift or functional, as for example the kitchen sandglass, exist until today. Exhibit in alcove 6 related to the sandglass: A sandglass used in pharmacy (a model), VMO Quotations: Time will uncover the truth (L. Annaeus Seneca) Time is the greatest expense (Antiphon of Athens) ROOM 114 (43.9 m2) SEARCHING THE TIME The combination of design and collages of personalities and their discoveries which contributed to the explanation of time. Two variants are possible to present the personalities: 3D presentation in the form of a figure (scenic material) or a planar collage. A part of the presentation will be the invention or discovery and a selected quotation (Galilei – pendulum, Ptolemaios – spheres, Newton – gravity, apple). Text in the frontal space: SEARCHING THE TIME The story of time begins 15 billion years ago in the Universe. Philosophers, astronomers, cosmologists, mathematicians, physicists, artists, as well as craftsmen participated in searching the mysteries of time. What is it, really? It is omnipresent and does not take any space. We can measure it, but we cannot see it, we cannot touch it, or dispose of it, or hide it somewhere. Everyone knows it and uses it every day, but cannot define it, describe or explain. It can be spent, saved, lost or wasted, but it cannot be destroyed or even changed. There is never more or less of it. Thousands of years since the moment when people raised their eyes to the sky they ask the same question. The best brains of our planet tried to give the best answer and solved the mystery. However, the never ending story, continues and it will be necessary to move a lot further to completely understand the time. "The attempts to explain the flow of time from the physical point of view and not only the philosophical point of view belong among the most exciting advances in time research at present. Until we sufficiently comprehend the flow of time or gain irrefutable evidence that time is only an illusion we will not even learn who we are or what our role is in the great drama of the Cosmos." Paul Davies: On Time Illustrations and texts at the front space of the room: ARISTOTLE (384 – 322 B.C.) AND PTOLEMAIOS (ABOUT 100-170) The Earth is round One of the greatest thinkers in the history of philosophy and the most versatile scholar of the ancient world, Aristotle the Greek, had stated as early as 340 years B.C. two reasons supporting the contention that the Earth is round and not a flat board. First he realised that the solar eclipse occurred at the moment of the Earth penetrating the space between the Moon and the Sun. the shadow of the Earth on the Moon is always round, thus the Earth itself must be round. If the Earth was a flat disc, the shadow would appear elongated. The Greek had also learned during their journeys, that the North Star appeared to be lower above the horizon when observed from the South then when observed from the most northern parts. An observer at the North Pole sees it above his/her head, while on the equator it appears on the horizon. Another reason was the fact that an oncoming ship showed first only the sails and only then the hull. There is one thing, though, where Aristotle had been mistaken. He thought that the Earth is immobile and the Sun, the Moon and the start orbit it in circles. His only reasons for this presumption were mystical. Aristotle´s ideas were elaborated into a complete cosmological model by another Greek astronomer, mathematician, physicist and geographer, Ptolemaios. The Earth was located in the centre and was surrounded by eight spheres, which carried the Moon, the Sun, the stars and the five planets known at that time – Mercury, Venus, Mars, Jupiter and Saturn. This model enabled quite accurate forecasts of the positions of heavenly bodies, but had also serious imperfections, which Ptolemaios was aware of. Despite all that, his model was accepted and even approved of by the Christian church as the image of the Universe corresponding with the Holy Scripture. There was one advantage – it saved space outside the spheres for the Heaven and the Hell. Ptolemaios was the author of the greatest Greek astronomical work Syntaxis Megalé (The Great System), which had been the canon of the medieval astronomy until the time of Copernicus. Quotation: "Our predecessors had seen the Sun, the Moon and the other start being carried from the East to the West along the circles that were parallel. They had seen them rise from the ground, reach the height, continue around, descend similarly towards the ground and disappear completely. Having been invisible for a certain time they again ascended and descended. Our predecessors had seen that the periods of these movements and the places of the ascend and descend were the same." Ptolemaios "The most remarkable is the ability of a man to think… Education has bitter roots but sweet fruit… Experience, contrary to knowledge, know but does not know why… Metaphor is the recognition sign of a genius: a human who can create a good metaphor can recognise the resemblance… Happiness belongs to those, who suffice with themselves…" Aristotle Illustration: The Ptolemaios´s model Nicolas Copernicus (1473 – 1543) The Sun in the centre Nicolas Copernicus, a Polish priest, mathematician, astronomer, and physician, placed in 1514 the Sun into the centre of his cosmological model and let the planets orbit it in circles. He thus denied the until then recognised geocentric theory of Ptolemaios and created the theory of a heliocentric system, where the Earth orbits the Sun and rotates around its own axis at the same time. He summarised his findings in the work Six Books On Orbiting the Heavenly Spheres. It was no earlier than 100 more years after Copernicus's death before the heliocentric system was accepted by the church. Moreover, Copernicus presumed that the Universe was finite, the Sun is in its centre and the trajectories of the heavenly bodies are circular. His assumption of a finite universe was beaten by Giordano Bruno, an Italian philosopher, and Johannes Kepler replaced the circular planetary trajectories for elliptical ones. Quotation: "Mathematics is written for mathematicians." Copernicus TYCHO BRAHE (1546 – 1601) Planetary system Tycho Brahe, a Danish philosopher, constructed a modern observatory on the Isle of Hven. It became the model for an astronomical centre of a global significance, which he created in Prague in the court of the Emperor Rudolf II together with J. Kepler. Brahe created a compromise system, a combination of the geo and heliocentric system, where the Sun orbited the Earth and the other planets orbited the Sun. he performed a number of relatively accurate astronomical observations which served J. Kepler as the foundation of the calculating the planetary trajectories. Tycho Brahe was buried in the Týnský Church in the Old Town Square in Prague. Tycho Brahe is engraved in the red marble as a knight in armour holding a sword in one hand and leaning the other one against a globe. There is a long Latin inscription celebrating the Danish scholar as "the most ingenious inventor and the most generous creator of astronomical tools". Quotation: "Better to be than to be dreamt." Tycho Brahe The right wall of the room JOHANNES KEPLER (1571 – 1630) Ellipses in the place of circles Johannes Kepler, a German astronomer, physicist, mathematician and philosopher, disproved the hypothesis of circular planetary trajectories. He replaced the circles in Copernicus's model with ellipses and achieved an outstanding agreement of his calculations with the observed positions of planets. He formulated mathematically the three laws describing the movements of the planets around the Sun. He constructed an astronomical telescope in 1630, which was named after him. He summarised his findings in his work "Astronomia nova". He predicted some results, which were later discovered by Isaac Newton. Kepler finally disproved the outdated system of Ptolemaios. It is interesting that several years before he formulated his laws he had some special ideas. For example he thought that the velocity of the planet orbit could be set to music (see the score). Illustration Quotation: "I find the paths along which people penetrate the essence of heavenly events as remarkable as these events themselves." Kepler GALILEO GALILEI (1564 – 1642) Pendulum An Italian physicist, astronomer, mathematician and philosopher, founder of the modern mechanics, who influenced greatly the birth of modern science. He constructed a telescope in 1609, which he used to observe craters and mountain ranges on the Moon and other heavenly bodies. He was a defender of Copernicus's heliocentric system. He wrote the book "Dialogue on two world systems" in 1632, which was praised by the whole Europe as a masterpiece of literature and philosophy. He was forced to recant his work in 1633 and was sentenced to life in home confinement. Galileo Galilei did one of the greatest discoveries significant for the further development of time measurement. He discovered that pendulum, a loosely moving weight hanging in one point always behaves in the same manner. Regardless of the mass of the weight and the distance of the swing, it always takes the same time to get from one marginal position to the other. The time needed to achieve one swing is only dependent on its length and changes with its prolongation or reduction. The pendulum does exactly what we need to measure the time. It does one action on and on, reliably and regularly, so adding its movements we can measure the time. The discovery of the properties of pendulum opened a path before chronometry leading to a revolutionary increase in accuracy. Space – the corner space right of the entrance into the room Galilei drew a pendulum clock, but this idea was realised only later by a Dutch scholar, Christian Huygens. He constructed the first pendulum clock in 1657. The daily deviation which had until then been somewhere between 15 – 60 minutes, dropped in the case o Huygens´s clock to 10 seconds. Quotation: "The nature is merciless and invariable. She does not care whether the man comprehends her causes and the intentions of her pursuance." Galilei Space – the corner part left of the entrance into the room ISAAC NEWTON (1643 – 1727) Gravity and absolute time Isaac Newton, an English physicist, mathematician and astronomer, formulated three basic principles of dynamics in his work "Mathematical Foundations of the Nature". He did not only describe the theory of the movement of bodies in space and time, but also invented a complex mathematical apparatus enabling the investigation of movement. He went further to prove that his movement principles are directed by another law, which explains how the gravitational force holds everything together. According to the law of general gravity every body in the Universe gravitates to every other body by a force, which is bigger with decreasing distance between the bodies and increasing weight of the bodies. The same sort of force directs the movement of planets and bodies falling on the Earth. Newton managed to prove that his gravitation law proves the elliptical movement of the Moon around the Earth and the planets around the Sun. Newton, and Aristotle before him, believed in absolute time. He assumed, that it was possible to determine positively the time interval between two events and that this time is the same for all observers if their clocks are in working order. Time was completely separated form space and their absolute independency was in agreement with the widespread opinion on the mutual relation between space and time. It's "absolute, true and mathematical time flows from itself and its nature, with no relation to anything external". The central position in the whole scheme was occupied by the hypothesis that solid bodies moved through the space along predictable trajectories and were subject to forces, which accelerated their movements in accordance with the strict mathematical laws. The real form of these laws enabled the calculations of the movements of the Moon and the planet, projectile trajectories, and other earthly bodies. It meant a progress in understanding the physical world. The success of Newton's laws of mechanics gave the impression that these laws could be used to explain any physical law in the Universe. The image of cosmos as gigantic clockwork arose form this belief, where each detail of its operation is predictable. The absolute universal time entered the laws of mechanics. While most ancient cultures viewed the cosmos as a rather capricious and moody organism, Newton showed us the worlds of exact logical principals. Newton changed the viewing of the Universe. His laws had been recognised for 200 years before Albert Einstein disproved his idea of absolute time with his special theory of relativity. Quotations: "Not one discovery was born without and daring estimation…" "I create hypotheses but I do not believe my own hypotheses completely… If I could see further, it was only thank to standing on the backs of giants…" "The truth cannot be better served than by purifying it form things false." Newton "One thousand apples dropped on the face of the Earth and only Newton could gain from his lump." Vítězslav Nezval Left wall of the room ALBERT EINSTIEN (1879 – 1955) Relative time Albert Einstein, an American physicist of a German origin, belongs among the most significant scientists of the modern history. He is a co-founder of modern physics and his contributions in the field of time investigation is absolutely fundamental. Paradoxical conclusions concerning the propagation of light signals and movements of solid bodies began to result from Newton's concept of absolute time at the turn of the 19th and 20th centuries. It took a few years and Newton's idea of time collapsed. There was another explanation of how the Universe behaves which Einstein offered. He presented two new ideas. Firstly, the laws of physics, the summary of rules managing the behaviour of the Universe are the same for all observers everywhere in the Universe. Secondly, the light velocity in vacuum is always the same. These presumptions sowed the seeds of the special theory of relativity. Einstein's theory introduced physicists into the idea of time, which is basically flexible. Although it did not renew the ancient idea of time as personal and subjective, it bound experiencing the time with an individual observer. Henceforth there was only my time and your time depending on how we move relative to each other. There was relative time. Caption with the illustration: Curved space Newton's theory of gravity would have remained in its original form until today should Albert Einstein not shifted it a giant leap forward at the beginning of the 20th century. He wrote in 1915, that space and time are of the same "dough". Large solid object deform the space-time around them and its curvature is the gravity. For example the Sun it curves the space around mightily into some sort of a "gravity hole", it creates a deep pit in time and space. This means that it takes the Sunlight longer to break free from the pit and reach the Earth. Small bodies such as Mercury do the same, only in a much smaller scale. Einstein's theories enabled the scientists a whole new view of the Universe as a matter, which curves the space into various shapes. Quotations: "If you are sitting for two hours in the company of a pretty girl it seems to you that only a minute has passed. If you are sitting for a minute on a heated stove, it seems to be two hours. That is relativity…" "The question is which is more important for a scientist, whether the knowledge of facts, or fantasy…" "The basic principles are not discoverable in a logical way. There is only the intuition which helps the sense of understanding the relations hidden behind a particular phenomenon…" "The most beautiful feelings follow from mysteries. These are the feelings, which stand at the cradle of the real art and the real science. The person who does not know this feeling, the person who cannot wonder any more and marvel is practically dead. Like a burned out candle." Einstein Illustrations: A collage of personalities of science and illustrations A combination of planar illustration and 3D objects. Maps: A copy of the map The World A combination of a terrestrial map and a map of the starlit sky with an outline of various systems – Copernicus, Ptolemaios A copy of the map Nouvelle Mappe Monde 1750 A combination of a terrestrial map and a map of the starlit sky with the systems of Copernicus, Brahe, Decartes, Ptolemaios Exhibits: Telescopes or bigger telescopes – not in the possession of VMO, it will be necessary to obtain a model. 2nd FLOOR Leaving the staircase onto the 2nd floor it will be necessary to direct the visitor into the corridor (204) which leads to the space denoted as the hall of the Mechanical Clock (210) in the original plans. SEGMENTING OF THE EXHIBITIN ON THE 2nd FLOOR 204 ENTRANCE CORRIDOR 210 MECHANICAL CLOCK 209 SPECIAL CLOCKS AND WATCHMAKING SHOP 208 TIME PHENOMENON 207 ELECTRIC AND ELECTRONIC CLOCKS - GREENWICH 206 FUTURE OF TIME 203/204 OLOMOUC REGION IN THE CONTEXT OF WATCHMAKING EUROPEAN It is necessary to state clearly the unidirectional advance in the interest of chronology of the exhibition on the 2nd floor and therefore to blind the till now considered connection of the rooms Mechanical clock (210) and Time Phenomenon (208), and also the room Electric and electronic clocks (207) and the corridor (204). A partial screening of the outer light with blinds in the room will be taken into account. A special light regime will be used where the interest is in accentuation of some crucial elements of the exhibition. A more noticeable stylisation will be especially in the room Time phenomenon with the presentation of the role of time in music, art, medicine, fashion, etc. The visitor will find a special accent on the presentation of the region and also the context and connection of the European cooperation at the end of the exhibition. 2nd floor before the entrance onto the 3rd floor. ROOM 210 (119 m2) – MECHANICAL CLOCK The largest room of the 2nd floor, which is the entrance into the modern chronometry, will present all basic types of mechanical clocks, where the engine is not electricity. This concerns tower, mural, table, grandfather or portable clocks. Some other relevant and interactive exhibits will be presented at the same time, such as hanging bell, which the visitor will be allowed to chime by tapping them, or a gigantic model of a pendulum, which will serve as a swing for children. The visitor will become acquainted with functional elements of the mechanical clock. A special attraction should be a scenic replica of the front of the Old Town Astronomical Clock. Contrary to the 1st floor, where scenic and graphic elements prevailed, in the room of the mechanical clock the main role will be played by the exhibit and its functional and esthetical quality. Technical captions will be balanced with artistic poetry speaking of TIME or CLOCK. The introduction to the mechanical clock on the wall right of the entrance into the room 210, where an exhibit of a tower clock and bell will be placed. Introductory text: MECHANICAL CLOCK A definition says that mechanical clocks are such devises, which use constant unchangeable forces to drive the mechanism, which can measure the constant and same intervals. The oldest mechanical clock fitting this definition is supposedly an anaphoric clock in Ancient Greece constructed in the 3rd century B.C. the sense of the anaphoric clock was to provide a 2D view of the Sun and Moon movements against the starlit sky. The name "anaphoric" is derived from Greek "anaphero" (to rise), which referred to the ascend and descend of various bright stars that had been depicted on the rotational dial. Ancient Rome named this sort of clock "horologium hibernum", or "the winter clock". The name is derived from the fact that the clock was mainly used during night time or in winter when the days are very short. The truly modern era of chronometry and mechanical clock came only with the revolutionary invention of wheel clock. This is a mechanical clock with functional elements of an escape and oscillator, which make this clock different from the elementary non-mechanical clock. In connection with this the mechanical clock, whose characteristic feature is the use of a cogwheel gear and pinions with a mechanical oscillator, is labelled a time measurer. The cradle of the mechanical clock is thought to be the countries of Western Europe from where the production of iron tower clock started to spread at the end of the 13th century. The dials of big mechanical clocks appeared on important buildings, town halls and churches of a number of European cities. 1288 on London Westminster Hall, 1300 in Florence, 1314 in Caen, in the 30s and 40s in Modena and Padova in Italy, Bruggs in Belgium and Dover in England. A monumental astronomical clock was constructed in 1352 on the cathedral in Strasbourg, in 1356 a tower clock appeared in Nurnberk, and in 1370 in Paris. Basel had its first tower clock in 1381 and Prague in 1410, which formed the basis of the Prague astronomical clock. All these are still today a fascinating demonstration of European inventiveness and skill. The public clock introduced a new element in the lives of town inhabitant. While the manually swung church bells announced the time of religious ceremonies, the tower clock organised the rhythm of work. The time of merchants and craftsmen began to have a precisely measured price. Richard of Wallingford belongs among the important personalities of the beginning of mechanical clock development, especially the first astronomical clocks in Europe. He was Abbot in the monastery of St Albans in England who lived at the turn of the 13th and 14th centuries. His astronomical clock belonged among the miracles of that era. Another outstanding watchmaking work of Middle Ages was Astrarium, which Giovanni de Dondi constructed in 1364, after 16 years of work. He was a physician working in Padova in the middle of the 14th century. Exhibit: An engine of a tower clock, signed "Frantz Lans 1734", VMO Exhibit: The bell from the village of Slatina from 1778, the bell maker signed: Kiss (VMO) Both exhibits will dominate the wall right of the entrance into the room 210. Opposite front wall of the room segmented by three windows A COPY OF THE PRAGUE ASTRONOMICAL CLOCK This exhibit will practically cover the middle window and the two side windows will remain to provide the external lighting. Exhibit: The front of the Prague astronomical clock (copy made by Filmdecor), statues of astronomical clock angel and skeleton on both sides of the replica. Text: PRAGUE ASTRONOMICAL CLOCK The astronomical clock on the Old Town Hall has belonged among the treasured and most admired sights of Prague for over 500 years. This originally simple astronomical clock had originally been constructed by a watchmaking master, Nicolas of Kadaň. Master Hanuš reconstructed it in 1490 and remade it into the unique perfection and beauty. The astronomical clock is composed of three independent parts. The fist one, the upper part is a mechanism, which starts the movements of 12 figures of the Apostles every hour. The upper part is complemented with the statue of skeleton that pulls a rope and turns the sand glass, the symbol of inevitable death, then a Turk, Miser and Vain Man, and there is a Cock in an alcove. The second part in the middle shows the common time, but also the trajectories of the Sun and the Moon through the zodiac constellations using circular spheres. It follows from the medieval opinion that the Earth lies in the heart of the Universe. The lowest and youngest part from 1866 is a calendar of days and months. 12 medallions of painters – the months – depict the life cycle in the country and were made by Josef Mánes. The astronomical clock mechanism was further improved by Jan Táborský of Klokotná Hora in the years 1552 to 1572. The uniqueness of the Prague astronomical clock is emblazoned with a legend of Master Hanuš, described in the Old Czech Legends by Alois Jirásek, a writer. This legend says that Master Hanuš had blinded by the councillors so he could not construct a similar astronomical clock anywhere in the world. Master Hanuš revenged himself by damaging the astronomical clock, which ceased to work for the next 80 years. Right side wall from the entrance The functional elements and principals of mechanical clock operation will be explained in the instructional and technical zone using drafts, detailed captions, especially as for the operation of various escape mechanisms. It is also appropriate to place a possible interactive kiosk in the room of functional elements, which will enable an animated demonstration of the functions. The exhibits in this room will be another tower clock, models of escape mechanisms, bridges, and balance bridges. Text. FUNCTIONAL ELEMENTS OF THE MECHANICAL CLOCK The engine of the mechanical clock is divided into four basic functional groups: Driving and gearing mechanism Escape mechanism Oscillator Demonstrating (registration) part Driving and gearing mechanism The source of energy is usually built directly in the clock mechanism and is its part – for example drums with pulleys and weights or a sea pen with a pen. The original principal of a wheel clock originates in the weight drive. An advantage in comparison with the pen drive was the consistency of the driving force. The operation of a good pendulum clock driven by a weight was usually regular. Their daily deviation was in the limit of several seconds or even tenths of seconds. The pen drive was introduced in the 15th and 16th centuries and opened up the possibilities of a general use the mechanical clock. This way had been prevailing with common commercial products but then it was pushed back by miniature sources of energy in electric and electronic clocks. Electricity transmitted directly from the electrical network or a primary cell is the source of drive of the electric clock. The weight, pen or primary cell is the energy storage; the energy is then brought to the oscillator via a gearing mechanism. Escape mechanism The escape is a link between the clock engine and the oscillator. It is a mechanism, which is constantly connected to the gear of the clock where it gains its driving force. The escape has two basic roles – it divides the driving force into individual force impulses that are transmitted to the oscillator. The impulses secure the oscillator in a constant unidirectional oscillatory movement. The second role of the escape is summing up the swings of the oscillator. There had been many escape systems, only some of them, however, lived to be widespread. Spindle escape consisted in an escape wheel with serrated teeth where two spots called pallets fitted in turns; the pallets were fixed onto a shaft (spindle). The spindle was fixed onto the oscillator – spirit component or pendulum. The pressure of a tooth the escape wheel pushed the pallet and thus the oscillator got its impulse. The escape wheel turned of one half of the tooth distance, the respective tooth on the opposite side of the wheel hit the second pallet, thus deviating it, and the oscillator obtained another impulse in the opposite direction. This cycle repeated regularly. Anchor escape consisted in an escape wheel with serrated teeth where two active spots (pallets) fitted in turn; the pallets were fixed onto the ends of the anchor shoulders. The axis of the anchor was connected with a pendulum via an impulse fork. The pressure of the escape wheel tooth pushed the pallet, the anchor was deviated and sent an impulse to the pendulum. Deviating the anchor, the escape wheel was released and turned of one half of the tooth distance. The respective tooth hit the second pallet and deviating it the pendulum obtained another impulse in the opposite direction. This cycle repeated regularly. Technical drafts with captions: SPINDLE ESCAPE WITH A SPIRIT COMPONENT 1) Escape wheel 2) Pallet spindle 3) Spirit component 4) Weight SPINDLE ESCAPE WITH A PENDULUM 1) Escape wheel 2) Pallet spindle 3) Pendulum ANCHOR ESCAPE 1) Escape wheel 2) Anchor 3) Anchor spindle 4) Impulse fork 5) Pendulum Oscillator The energy in the same amounts is transferred from the escape onto the oscillator which via its constant swings always creates and reproduces the artificial time unit called the frequency (time) standard. The stability of the oscillator's frequency of oscillations is the main prerequisite of accuracy of the clock. The basic principal is the swing of the oscillator, the movement from the marginal rest position to the other one. Two subsequent swings are the oscillation. The number of oscillations in a second gives the so-called frequency. The oscillator generates oscillations. It also regulates the time sequence of force impulses of the escape and thus retrogressively manages the operation of the whole clock engine with a pointing mechanism. Oscillators of clock engines are in contrast to the plentiful number of types of escape systems. Only three of them, however, are really important: the spirit component, balance and pendulum. They appeared in several variations during the development. The oldest one is the spirit component. It is not exactly an oscillator, as it does not have its own time of swing. It basically concerns a balance wheel, which was usually formed of a T-crossbar on a vertical axis. The regulation was accomplished shifting little weights in notches at both ends of the shoulders. Introducing the pendulum provided a considerably greater precision in the clock operation. Portable clocks used a balance – a little balance wheel connected with a fine spiral spring – hair. The attainable preciseness is lower than with the pendulum. Pointing part The digital numerical system began to be used at the beginning of the 20th century along with the hand pointer with a dial. A pointing mechanism of any kind id always connected with a clock engine and gives continuous time increase smoothly or in given time intervals (second, minute). Exhibits in the Pointing part: Various kinds of dials and hands (if the real exhibits are absent, they will be replaced with illustrative reproductions) Two more exhibits of tower clocks will be placed along the right side wall. Exhibit: the engine of a pocket watch with a calendar, NTM Exhibit: the engine of a pocket watch with a two-sided dial, NTM Exhibit: a miniature pocket watch, NTM Exhibit: a double-jacket pocket watch with a spindle escape, NTM Exhibit: a pocket set of a barometer and a watch for naval officers, NTM Exhibit: a pocket watch, NTM Exhibit: a pocket watch, about 1770, VMO Exhibit: a ladies pocket watch, signed Mayer, Lintz, after 1800, VMO Exhibit: a pocket watch, France, middle of the 19the century, VMO Exhibit: a pocket watch, after 1800, VMO Exhibit: a golden pocket watch signed Josef Radda, Olmutz, the1860s, VMO Exhibit: a pocket watch with a calendar, signature of the firm "Edda Watch Co", Switzerland, second half of the 19th century, VMO Exhibit: a travel alarm clock, Austria, first half of the 19th century, VMO A collection of mural and standing clocks will be placed along the left sidewall. Text: MURAL CLOCK At the turn of the 14th and 15th centuries there started to appear iron room clocks driven by a pendulum. They had not differ greatly in the concept or the construction from the bigger tower clocks. The pendulum drive did not only determine the appearance of the clock, but also their location, an elevated position necessary to achieve the longest possible operation. The mural weight clock kept their popularity until later when the pen drive was introduced. So-called lantern mural clocks emerged about 1600 in English watchmaking shops. The name might have derived from the shape of their casing, which resembled the old candle lantern. The case of the lantern clock was formed by two horizontal massive boards connected by four corner posts. The front part of the clock was covered with a round dial with one steel hand and Roman digits. The French pendule called after the inevitable pendulum achieved a great perfection and richness in shape. France was conquered by the fashion of mural cartel clocks with a segmented shape, rich ornament, and a number of other rococo and classicism elements at the beginning of the 18th century. The latest and most widely spread sort of mural clock was the so-called grandfather clock that was decorated with carved ornaments. Grandfather clocks were constructed at the turn of the 18th and 19th centuries, especially in the countries of the Habsburg monarchy. Exhibits of mural clocks Exhibit: a mural clock with a spirit component (a model of the original from 1507), VMO Exhibit: a metal mural clock with motifs of little angels, middle of the 18th century, VMO Exhibit: a metal mural clock with the motif of Adam and Eve under the Tree of Knowledge of Good and Evil, first half of the 18th century, VMO Exhibit: a mural grandfather clock, end of the 18th century, VMO Exhibit: a tiny mural clock, end of the 18th century, VMO Exhibit: a framed mural clock, around 1830, VMO Exhibit: a porcelain mural clock, signed Eduard Thondel, second half of the 19th century, VMO Exhibit: a mural clock with the relief of a lying hunter, 3/4 of the 19th century, VMO Exhibit: a mural cuckoo clock, second half of the 19th century, VMO Exhibit: a mural astronomical chronometer, first half of the 20th century, VMO Exhibit: a grandfather mural clock, the 1840s, VMO Exhibit: a lantern clock – torso, after 1700, VMO Text: STANDING CLOCK This is an independent group of clocks. Their size and shape reflects the development of functional and decorative elements of various style periods. They first appeared around the year 1650. They had been made for over two hundred years and had some invariable common elements, such as the pendulum engine driven by a pendulum, a beating mechanism, and a tall wooden case. The height of floor clocks was about 270 cm in the 18th and 19th centuries. The case of the standing clock was usually made by a Master cabinetmaker and carried period features of furniture. The most commonly used wood was that of olive tree or walnut tree. Cabinetmakers developed the technique of inlay, which means inlaying the wood with ornaments and geometrical shapes made of box tree wood, ivory or ebony. The construction of clock cases had first been influenced at the beginning of the 18th century by importing refined wood, mainly mahogany. Europe used oak wood as the most suitable and cheapest material to make the case frame and veneer. Exhibits of standing clocks Exhibit: an interior standing clock, Pacovský and Plánička, the 1920s, VMO Exhibit: an standing clock engine, signed V.Z.Sutter, NTM Exhibit: an standing floor clock, signer F. Schwartz, Vienna, second half of the 19th century, VMO Central space HANGING MODEL CONSTRUCTION OF GALILEO´S ESCAPE WITHA PENDULUM (mast be manufactured) an alternative: RELIEF WITH THE MOTFS OF STARS AND THE SUN WITH A MASSIVE PENDULUM ("Floating Time" by the painter and printmaker F. Bělohlávek, 1st half of the 1970, VMO) Text: PENDULUM AND PRECISE TIME At the turn of the 16th and 17th centuries, Galileo Galilei discovered something really significant for time measurement. He discovered that the pendulum, loosely swinging weight hanging from one point always behaves the identically. Regardless of the mass of the weight a haw far it swings, it always takes the same time to travel from one marginal position to the other one. The time needed for the pendulum to reach one entire swing only depends on its length and changes dependent on its prolongation or reduction. The pendulum does exactly what we nee to measure time. It perform the one and only thing on and on, reliably and regularly, which means that adding its swings enables time measurement. The discovery of chronometry opened up the path to a revolutionary increase of preciseness. Galileo drafted pendulum clocks, his ideas, however, were realised only by the Dutch scholar Christian Huygens. He constructed the first pendulum clock in 1657. The daily deviation of a mechanical clock, which represented some 15 - 60 minutes in the case of a mechanical clock, dropped to 10 seconds. Possible to add an illustration: Draft of Galileo´s escape, Vinzenzo Viviani Draft of Huygens´s oscillator HANGING BELL Exhibit: The bell from the village of Hýsky, 1848, bell maker signature: Stanke Text: BELLS The Church represented the dominant feature of the medieval culture. Each craft had its patron saint, there was a chapel at every castle and chateau, the calendar was a list of saints´ days and of religious feasts. The Church established a time order related to the schedule of the church service. Similarly to Christianity, other monotheistic religions had their specific time devoted to church service. Judaism assembled people to pray three times a day, Islam five times a day. The times of prayers were approximately connected with the movement of the Sun in the sky. Christianity had been more consistent in stating the time of prayers. It placed the time of church services to the third, sixth and ninth hour of the day (after the sunrise) in as early as the 2nd century. The terms of church services had differed in the following centuries according to local traditions. St Benedict established seven times for the prayer as the essence of a religious day and monastic order (before dawn, after dawn, the third hour, the sixth hour, the ninth hour, the eleventh hour, and after dusk). Thus the need of the Church to measure time was caused rather by the necessity of maintaining regular intervals between prayers. The time of prayer was announced by bells. Bells, bells, bells. Since time immemorial till today. The Chinese made bells as early as in the Bronze Age, the third millennium B.C. the use of bells in Europe connected with Christian ritual dates back to the sixth century, and even after the mechanical clock had been invented they were part of the public medieval timekeeping. The Latin work denoting a bell – clocca – started later to be used in different languages to denote time measurement (clock in English, cloque in French, Glocke in German). Monasteries, the first organised productive centres of work lived and worked according to the rhythm given by bells, which measured the time to wok, to rest, to pray, or to meditate. Bells cancelled individual or autonomous time and established social time. They supervised its proper use and managed the whole process to be the most effective. The need of time signals arose together with the development of trade and industry towards a greater complexity of life of the society. Urban communities adopted the system of a religious community. Bells tolled the beginning of work, time to eat, end of work, closing of the town gates, opening of the market, and time of a gathering. They announced holidays, as well as an oncoming danger. The other part of the left sidewall will be used to present the fundamental significance of the mechanical clock for the development of civilisation in the form of texts as well as a fantastic design collage. Text: WHY? It is interesting that most disputes concerning the mechanical clock concerned the technical features. Who was the first to use the pendulum as an oscillator? Why had the Burgi´s spindle escape with two counter spirit components been used much more widely? Who was first, Galilei or Huygens Only few analyses concerning the development of the mechanical clock ask the question: WHY? Why did the development of a clock proceed in this manner, what was the accelerator of each new invention? One of the possible answers is that it was the desire to achieve higher and higher preciseness, which rushed the development forwards. The true reason, however, was the unquestionable social need. The only time that the medieval monk needed to know was the time of prayer. This purpose did not require a more perfect clock. A renaissance human dependant on trade and communication needed to know the time to be able to meet the programme of their meetings, tasks, or duties. And as a social creature with needs dictating the development of watchmaking according to the social interests, to the development of a tower clock, portable, night clock, and more and more personal forms of a clock, towards increasing preciseness. The aesthetic dimension is often overlooked as unimportant – the function of a clock as a jewels or a part of the interior. Text: MECHANICAL CLOCK ONE OF THE GREATEST INVENTIONS OF THE HUMANKIND The invention of the mechanical clock falls just behind the invention of fire and wheel, it belongs amongst the greatest inventions of the humankind due to its influence on the cultural value, technological changes, social and political organisation of people and their personality. The genius of an anonymous inventor does not really consist in the construction of the escape mechanism but in the oscillator, which divided the time into the same and regular intervals. This moment became the heart and the central theme of future time measurement and the mechanical clock. The mechanical clock also became a metaphor of human (and sometimes also divine) pursuance. Vicar of the Rouen cathedral wrote in his commentary of Aristotle´s Livre du ciel et du monde: "…the creation of heaven and setting the heavenly bodies to move is similar to human making a clock, starting them, and letting them run in their own move." Johannes Kepler described his intentions as attempts to "prove that the heavenly engine … is a sort of a clock engine". The mechanical clock and metaphor meant much more than development of scientific thinking and more perfect devices. They became the instrument to understand human behaviour, decision the humankind accepted, and actions they took. The metaphor offered a template and unpronounced imperative for managing and organising human lives, especially as for the work process. The mechanical clock's cause was much more important than that of any human invention. They offer an archetype of seeing the God and the Universe. It is obvious that the clock represent a great metaphor of the third millennium. Saying that understanding time means nothing less than understanding the world we live in is no hyperbole. Text: UNIQUE STORY The first part of the unique story of the mechanical clock asks the question why such an ingenious invention occurred in Europe and why it had remained it monopoly for the next 500 years. The entire Europe had little to do with any scientific or industrial pioneering of the terrestrial civilisation. In watchmaking it lagged behind China and the Islamic countries. The invention of the mechanical clock was one of the vital moments to turn Europe from a weak peripheral vulnerable civilisation into a strong hegemonic leader. Time measurement suddenly became the signal of a newly found creativity and accelerator of knowledge use benefiting the wealth and power. The journey from the big inaccurate medieval tower clock to the accurate naval chronometers lasted 500 years. The best craftsmen and scientists of their time met there. No other project of applied science concentrated so much talent and intelligence. It was reasonable, the accurate time measurement influenced the trade, as well as navigation. The most interesting part of the unique story concerns the people made clocks. This is a great piece of history of economy, of development of production techniques and ways of production. 700 years later, the mechanical clock made way for the crystals. The history of the development of the mechanical clock is also important since it influenced a whole number of other production areas. Only few other objects played such an important role in creating the way of life and work of people as a clock and a watch. No other production area did as much for understanding machines and instrument and understanding the division of labour as watchmaking. The local specifications are not vital in this production area. It is not necessary to work near the sources of material as the material means only a fraction of the production expenses. The process of production itself needs only little energy, no coal or water is needed. And last, the transport of the final product is easy and inexpensive. Altogether, clocks can be made anywhere where there are skilled hands managed by sophisticated technicians and creative designers. All these are the reasons why watchmaking can be a great laboratory for studying the human share in successful industrial process. THE MOST EFFECTIVE MACHINES IN THE WORLD Mechanical clock represents the most effective machine in the world. The energy released from one cubic centimetre or one thousandth of a litre of petrol will drive the clock for 585 years. They are also most precise. The deviation of the same clock in 585 years will be one ten thousandth of the entire time of the observed period, which represents 10 – 15 seconds/day. ROOM 208 (76 m2) TIME PHENOMENON Note The room devoted to distinctive graphic stylisation of time phenomenon, presentation of the importance and representation of time in the visual arts, music, medicine, fashion and in society in general. This part covers the social dimension of time, how it penetrates all spheres of human life and determines the pulse of human civilisation. The following notice on the opposite wall before the entrance: TIME PHENOMENON Left side wall Text: TIME AND ARTS A human being forms things, ideas and images. Most of them are designed for his survival. Important for survival are both the abstraction of practical experience and imagination. Formation of imaginative figures and abstract terms is not simple but despite that philosophers, poets, theologians, scientists and artists devoted endless efforts to define and capture time. This process starts with a metaphor achieving gradually different forms. The attempts to represent personified time developed for millenniums. Most human cultures had not one god or goddess. Since the ancient times, time had been the essence measured by Sun and stars but not formed by them. Although time could be assigned certain unearthly properties, it never became a deity nor adoration object. For centuries the artists had dealt with time by the manner determined by creator's personality and the culture he lived in. The image of "Time Father" as a baldhead old man with wings, who holds a sickle, scythe, scissors or serpent eating his own tail, is a modern concept made in the course of millenniums. The Romans did not depict time directly but indirectly in the figure of Kairos, naked and winged young man who personified a short moment of changeable happiness. The second ancient figure comes probably from Persia and became part of the cult associated with Mithras. This god known also as Aion is a symbol of divine eternity where time is a source of creative powers. The Persian Aion is a masculine figure with a lion head and a serpent around his body, holds a key. Another depiction of Aion is a human figure in "time circle" consisting of twelve Zodiac signs. Another original trace of "Time Father" leads to Ancient Greece. The Greek term for time is "chronos" and is closely associated with the name of the oldest Greek god Cronus who was the oldest Titan and father of Zeus. (Twelve giant deities, children of Uranus (god of heavens) and Gaea (goddess of Earth). Cronus is depicted as old man with streaming beard holding a sickle. Plutarch pointed out he relation between the term "chronos" and "Cronus" and concluded that Cronus should be Time Father. It had often been depicted but in general this oldest god had never been personified as time. Later on, Cronus as Roman Saturn is described in the mediaeval literature of the 4th century as a figure with a sickle. Serpent is a symbol of the year and illustrates the way by which time consumes itself. A well-known story of Cronos (Saturn) eating his children is interpreted by medieval narrators as a scene of time eating everything, which stands in its way. The topic of time in Greek legends is also personified by Moiras – goddesses of destiny resembling the Fatal Sisters. The Greek term "Moira" means not only destiny but also the fate consisting of all events independent of man´s will. The Ancient Greeks thought the Moiras as unsmiling old women: Clotho with a spindle, Lachesis with a globe and Atropos reading the life book or with sundial where she shows the death hour. Out of all world cultures only two of them personified time. The first one is the Greek-Roman tradition considered as "Time Father" in the Middle Ages. The second one is Chinese culture where Shou Lao (old longevity) or Shou Xing (longevity star) are two names for "Longevity God", which was initially a deity personifying the passage of time. Shou Lao is depicted as an old man with big head and represents the god who determines the death at man´s birth. His sculptures are symbols and talismans of longevity. They are made of materials characterized by special hardness (e.g. amber). Illustrations Time triumph Nicolas Poussin: Sketch of the picture "Dance at time music" François Perrier. Time is cutting Cupid's wings, 1630-70 Pompeo Batoni: Time revealing the truth, 1745-1746 Hans von Aachen: Allegory with Time Father, 1680 Clock with Time Father, 18th century Crispijn de Passe: Use and Misuse of Time Sculpture of Shou Lao, amber, 17th century Sculpture of Shou Xing, amber, 19th century Shou (longevity), silk painting, 19th century Quotation: We do not work to produce but give time its value (E. Delacroix) Life is too short and time lost by yawning never returns (Stendhal) Right opposite wall and right opposite corner Text: TIME AND MEDICINE Over hundred functions have been known to oscillate in a human body. At a short end of time spectrum there is a tenth second of wave oscillation in human brain recorded by the electroencephalogram (EEG). One second represents the basic heart rhythm and sic seconds the respiratory rhythm. Temperature of human body changes in the cycle of 24 hours - the highest in the evening and the lowest in the morning. A longer end of time scale covers a 28day menstrual period and the historic residue of a 365-day cycle of wintering. The human body operates at a regular pulse. The icon of time base of modern medicine is always put on a hospital bed giving the record of patient´s temperature and other body functions. Physiologists of 19th century put time in the form of ticking clock directly in the centre of medical biology. Human body was considered as a tuned chronometer and subsequently the success of modern medicine was estimated according to prolonged life and longevity achieved. Geriatrics became an important branch of medicine. Time obsession tends to consider a human body as clockwork. A great impact of astrology upon the history of medicine was based on the rhythm of celestial bodies. Every crucial act was considered with respect to the most suitable moment for therapy, surgical intervention, taking medicines and harvest of medicinal herbs. During medieval and renaissance stages, the astrologic diagnostics was elaborated into details and this reflects into the present time in the alternative and supportive medical approaches. In the traditional Chinese medicine, the measurement of pulse provided basic information about circulation of the power "qi". Determination and classification of the pulse, its intensity, resonance and duration was the most important diagnostic method in Chinese medicine. In 19th century, several instruments were discovered in Europe, e.g. sphygmograph recording graphically the pulse. That led to the presumption that if vital functions could be measured by time elements, then life is a time phenomenon. Physiologists of 19th century thus introduced a standard physiological time in biological framework. The idea of internal physiological clock was accepted by medicine and modern culture in general. The philosophic idea of human inborn instinctive time measure is reflected in the books of Oscar Wilde (Dorian Gray), Marcel Proust (Recherche du temps perdu) and Samuel Beckett (Waiting for Godot) where the internal clock of their characters tempt the external time. At the beginning of the third millennium, mankind seems to conclude that life goes according to biological clock and medicine should keep its run. Even in the third millennium the proverb "Time is a great healer" holds true as it did in the past. Illustration: Zodiac man from the Guildbook of the Barber – Surgeons (handbook of barbers and physicians of 15th century), The Story of Time, p. 224. Text Until 19th century, stars represented a real time measurement for medical practice. Since ancient times, humans thought a human body as a miniature of universe "body". That was based on the presumption that laws defining the celestial order (macrocosm) had been identical with those controlling the life in a smaller scale (microcosm). The opinion that the universe is controlled by stable principles from the greatest to the lowest ones had been common in most scientific theories of end 20th century (see the solution of differences between the quantum mechanics and Einstein´s theory of mass nature), different opinions appeared on the intersection of various scales. Astrology interconnected the micro- and macrocosm. Stars were considered as moving power controlling the whole basic quality of terrestrial life. Celestial movement directly influenced individual´s life. Hippocrates, the Father of Medicine, said: "The person who does not understand astrology is not a physician but stupid". Prior to making diagnosis or operation, physicians should first "consult" constellation and then decide about therapy. Astrologic medicine was extremely focussed on time exposition. Every year, detailed astrologic maps and diagrams had been elaborated with the constellation of the Sun and Moon as well as other celestial bodies indicating the favourable and safe time for initiation of therapy on various sites of human body. Every part of human body was assigned a certain sign of Zodiac and a certain planet. The knowledge of controlling power of a corresponding astral regulator for a given organ was called melithesia. A successful operation required a correct constellation of the Sun and Moon against the Zodiac, other planets and a given organ or the site of medical problem. In case of neglecting it, the basic body fluids could be unbalanced, i.e. the unfavourable effect of Saturn could result in an increased level of black gall and pronounced melancholy. In other hand, excess gall caused by wrong constellation could lead to fatal fewer. Quite crucial was the knowledge of individual phases and properties of the Moon and their effect on blood circulation and bleeding. Physicians at that time often took with them a visual "manual" – "zodiac man" remembering connections between the sign and human organ. Zodiac Man The Zodiac man personified "sympathy" between various organs and zodiac signs. For instance, head was governed by Aries, neck by Taurus, shoulders, hand and arms by Gemini, breast, liver and upper digestive tract by Cancer, heart by Lion, bowels by Virgo, genitals by Scorpio, thigh by Sagittarius, knees by Capricorn, shins by Aquarius, soles by Pisces. Quotation: Time does not heal everything, just moves away the open wounds from the centre of attention (H. Marcuse) Continuing space between two windows on the right lateral wall Text TIME AND MUSIC Music, either read from musical notation or played, exists just in time so that could be measured. This is common for all kinds of music, from that played at the court of Tang Dynasty to the compositions of Duke Ellington. Nevertheless, some music cultures do not need to record music in a written form. African drummers and South American Indian musicians handed over the musical tradition orally from generation to generation before the European ethnographers started to record it. The requirement to define precisely the duration, dynamics and emotional presentation influenced the development of European music records. The music system consisting of graphic symbols combined with verbal instructions later on became binding in terms of accuracy and time limits. The score of the 19th and 20th centuries is a complex and accurate system defining the rhythm, dynamics and duration of each note. This resulted in a precise visual record of a given composition, which is presented in the actual state of its introduction. The aim of music, along with arithmetic, geometry and astronomy, was to help the knowledge of absolute numbers, divine order controlling the Universe. Thus music allowed to understand numerical relations representing the rational essentials of harmony and rhythms. Boethius defined four basic principles of learning and education: Arithmetic, geometry, astronomy and music. Theory of music - scales, intervals and harmony – were expressed using mathematical terms. In Practica Musica dated 1496, one measure (tactus) equalled the pulse of one common respiratory interval. Later on, the tempo is recorded in the form of a written instruction accelerating or reducing the tempo. An actual inspiration by time and its variability are expressed in pieces of numerous renowned composers, e.g. Haydn, (symphony "Clock"), Vivaldi (symphony "Four Seasons"), Chopin ("Minute Waltz"). Exhibit: Metronome (NTM) Text: A metronome is a clockwork device that beats time at a determined rate. It was invented in 1812 by Dietrich Winkel, commercialised and patented by the entrepreneur Johann Maelzel who sent 200 samples to European composers. A metronome prototype was calibrated to the 50-160 frequency; L. van Beethoven allegedly determined the scale. Subsequent metronomes were calibrated to the frequency from 40 to 208. It gained an enormous success and at the beginning of 20th century Maurice Ravel used it as the solo musical instrument in the introduction of his composition L´Heure espagnole (Spanish Hour). In 1962, the composer Ligeti used metronome in much more extent in his composition for 100 metronomes. Illustration Musical notation of W.A. Mozart: Figaro´s Marriage (Museum of Music in Prague) and notations of known Czech composers Motet for 36 voices, manuscript of 15th century Exhibit: Bell (VMO) Illustration: Prague Loreta Carillon Text : Loreta Since 14th century, the reports on a harmonised set of bells appeared. First attempts were made to harmonise bell, clock and organ. In the 15th century, bells became the instrument typical of a monastery clock. One of the most spectacular and historical monuments of Prague is the Loreta, a baroque place of pilgrimage, renowned mostly for art treasure and unique carillon. Thirty signed bells were made by the bell-caster Claudy Fremy of Amsterdam during 16831691. In 1695, the ordination of the Loreta carillon was a grand occasion. The Prague clockmaker Petr Neumann was charged with the composition of carillon and musical clock manufacturing. He located the bells into the front of clock tower together with a complicated mechanism activating the carillon. The musical box controlled by the clock machine goes round every hour and plays the melody taking one minute. In 1744, the song "God bless you our Lady" was installed and has been played to present. In addition to the automatically reproduced song, the carillon can be played manually using a large keyboard placed in the tower. This historical carillon is a unique object of its kind in the world. During the last reconstruction of the Loreta carillon in 1994, it was decided to take a unique record of the song, which was completed with rare records of the restored carillon. (The Music of Prague Loreta will be put in the whole area. CD with this record will be available.) Quotation Time is a great teacher, unfortunately kills all pupils. (Hector Berlioz) Nothing more precious and valuable exists than time. (L. van Beethoven) Continuing space between two windows on the right lateral wall Text TIME AND TREND Trend is the most illustrative of the transience of time. Trend in general covers all external manifestations of a given epoch, including moral concepts, behaviour, life style and fashion. Especially the latter reflects the spirit of a given epoch as it is reflected in economy. Each new trend presents a new imperative ideal of beauty expressed in human body. Each epoch has its ideal beauty and particularly the feminine beauty is indefinite and crucial (e.g. baroque round ideal of Rubens versus delicacy of Modigliani). The linear and cyclic concepts of time seem to be illogical in fashion, not bound by any mathematical-physical law of this planet and universe. The society moves ahead and at the same time returns nostalgically to our grandparents´ fashion. The entropic time arrow seems to be affected by a special kind of schism. The trend reflects and sometimes anticipates time and spirit of a given epoch. Before the French Revolution, the consumption of make-up powder at European royal courts was enormous and amounted to hundred thousands of pounds. With regard to the fact that powder was made from flour, scarce goods for the starving people, that signalised a future social change. That hold true for court wigs so high at the court of Louis XV. that they were often singed by chandelier candles. One or two nights before a ball, ladies could not normally sleep in order to avoid destruction of works of art. As the wigs needed a lot of powder, the following biased opinion of a contemporary observer can be accepted: "Trends are smoke signals of much more important changes of social structures." Even at present the fashion reflects and even illustrates of historic and social changes. Fashion is a popular, concrete and clear evidence of cyclic recurring nature of linear time passing. Illustration : Encyclopédie illustrée du costume et de la mode Quotation Time will go back and then return with gold age. (John Milton) Corner on the right side of entrance Text TIME AND SOCIETY The evolution of modern society is controlled by Time. Over millennium passed after the period of liturgy, time of prayers through the time of craftsmen and industrialists to work time. The legendary Edict of Charles V., French king, ordered that all clocks in the country had to be set according to the royal clocks in St. Vincennes and Louvre. That young secular state thus impaired the predominance of Church and liturgy. Time became state, rational time. The dramatic turnover of time concept was brought about by the Industrial Revolution and the newly presented phenomenon of time economy and working hours gained the sociologic, economic and political importance. The basic question became: Since when – till when – how much? This is a day-to-day experience of time shortage caused by actual life style of modern society, time control and planning, time became a commodity. People have been loosing their individual time control and the natural and spontaneous human life rhythm goes away. Time and working hours Salary in the Middle Ages had been closely related to a working day. A daylight was standard. Working hours had been regulated variously, e.g. in Paris washers started to work at the moment "they recognized a person at daylight". In 1375 in Hamburg, a smith finished his work in autumn "when sun gained gold colour" and in winter "when day made place for night". The criterion of the commencement and end of work was to recognize two coins in the coming darkness. Very important were time signs represented by "working bells". The tone of those bells differed from that of municipality and church. As the labour gained in importance, the beginning and end of working day as well as lunch breaks were signalised by bells ringing. It should be mentioned there that in the Middle Ages the Czech king Wenceslas II. issued "Jus regale montanorum" in order to regulate working time of miners. Invention of mechanical clock resulted in a more correct measurement of working time and production. During the late Middle Ages, the initially abstract definition of a day to "hora", i.e. mining shift or a quarter of the day, developed into a more concrete definition of an hour representing a stricter connection between time and wage. Hourly wage as a standard became normal in late 18th century. The developing industrialization associated with the measurement of working hours resulted in big social conflicts. The struggle started for the duration of working day extended enormously under "time economy" but did not deal just with the duration but also regularity of working process and its intensity as basic conditions of effectiveness. Measurement of a working day, say in other terms – duration of working hours, rest, holiday, flexitime, time records and retirement age still remain the crucial political topic. LITTLE BIG WATCHMAKER Henry Ford, founder of the car factory Ford Motor Company and one of the most important industrialist of 20th century had been fascinated in his youth by clocks and watches. As an auto-didact he was successful as a repairman and when he left his home, he was able to earn some money by that activity. Later on, when organizing the car production, his knowledge of clock mechanisms helped him much. Ford´s manufacturing lines represent pros and cons of his legacy. As a metaphor, Ford´s manufacturing lines represented the "absolutely regular movements" of clocks. The workflow was timed (step mechanism) and the manufacturing continued as a stable and regular process similar to that of the mechanical clock. "Henry made a giant clock" said one of his friends about Ford´s factory. Illustration: United States, International Time Recording Catalogue, 1914 (control, factory clock) Caption with the illustration Control clock recording the comings and goings of workers on the printed cards (time cards) enabled a correct keeping of working time, including overtime to be paid. Quotation Time is allegedly equal to money; yes but money is not equal to time. It is possible to do a lot without money but nothing without time. (Jan Neruda) Text Time for sale Time is a divine gift so not for sale (ancient proverb) Time is money (recent proverb) Because time is a divine gift, it cannot be sold or bought. It was the approach of Church in the Middle Ages. Although usury had been considered variously, question of time was decisive. One of many explanations is in the "Tabula exemplorum" of the 13th century stating: "As usurers sell just hope of future money, that is time, they sell day and night. But the day is a light and the night is a rest. Therefore they sell eternal light and rest". At present, only few things differ so much from those concerned by the medieval theology than of today´s finances. Mortgage, instalment payment, loans, pension plans and investments come from the quite different period. What do these transactions mean? - just sale and purchase of time. Mortgage is more expensive than cash payment because a house is bought plus time spent in this house before to be fully paid-up. When one buys the state public bond, his money are borrowed to the government and expected to be returned in the future. In fact, the whole economic machine stops at the moment when time is not considered as goods. Credit purchase is similarly decisive for our life as time shown by our clocks. Text More precisely Young mercantile societies, especially in England and Holland, requested more precise clocks. Subsequently, the request of more precise measurement of time resulted in worse understanding and/or the existing time measurement variations and errors. In addition to the general social request of more precise time measurement, two specific factors should be mentioned there. First, astronomers: they had considered time measurement as a complement and tool for automation of planetaria and astraria. But they often realized that better and more precise clock would allow better and more precise observation. Tycho de Brahe was a protagonist of manufacturing more perfect clocks. His efforts gained better achievements due to a clock with enormous wheel of over one meter in diameter with over one thousand-toothed wheel. Second, merchants: the necessity to calculate precisely longitude on sea and stimulate the development of world transport and commerce. Quotation In short, time is everything important for human beings. Bernard d´Espagnat Note Sounding with the Loreta carillon (CD) and records of various bells provided by the Czech Broadcast (Mr. Rejšek). Central area Note The central area is suitable for the topic entitled "Time Machine" – a fantasy concept. This is a great topic that can be supported by many artists or students of art schools. Presentation on the 3rd floor. Exhibition of the best pieces of art. Text TIME MACHINE Is it possible to construct a machine transporting people through time? 100 years ago just a few people thought that a cosmic travel of man could be realized. Time travelling and space travels had been considered as a quite impossible fantasy. Today, space travels are not surprising. Could space travels be routine travelling too? Imagine the following situation: you get into a time machine, push several buttons and will get off not only SOMEWHERE but IN ANOTHER TIME! The sci-fi writers used this motif many time since H.G. Wells wrote his famous novel called "The Time Machine". Hollywood movies often present it as an easy transport, e.g. "Back to the Future". The topic of time travelling offers a lot of questions. Where is the future and past? Could a man enter the world which doest not exist? Can he change the past when he visits it? What all that means for the future? Sir Isaac Newton presented his theory of absolute and universal time when time is all the same everywhere and for everybody. According to his theory your NOW and their or my NOW would be the same whenever you are doing anything. Albert Einstein with his theory of relativity demolished Newton´s concept of time and space and erased the universal division of time into past, presence and future. He thus opened the door for time travelling. Scientific authorities now accept the opinion that "time is relative". The theory of relativity indicates that a certain, somewhat limited time travelling is possible. Those, who do not think it, are addressed the known note of J.B.S. Haldan: "The Universe is more mysterious we believe and even more mysterious we could think". Despite all possible concepts of the time machine, remember the words of Albert Einstein responsible for this idea: "The question is which is more important for a scientist, whether the knowledge of facts, or fantasy…" "The most beautiful feelings follow from mysteries. These are the feelings that stand at the cradle of the real art and the real science. The person who does not know this feeling, the person who cannot wonder any more and marvel is practically dead. Like a burned out candle." So, we would like to invite you, before you get one time in the time machine, to the world of fantasy. Exhibit: Time machine, author(s) Room 207 (48 m2) – ELECTRIC AND ELECTRONIC CLOCKS MERIDIANS AND PARALLELS OF LATITUDE Note: In the room 207 the connecting doors between room 207 and corridor should be blinded. This would give an integral area in the left part of the room for presentation of parallels of latitude, Greenwich meridian, time zones, geochrone, Harrison´s invention of chronometer and interactive quadrant. In the right part of the entrance there would be presented the topic of electric and electronic clocks, still not attractive due to the lack of interesting exhibits. Suitable could be the street clock with radio transfer of time information as Mr. Kynčl suggested. Such an exhibit is still missing. Central caption on the front wall to the entrance ELECTRIC AND ELECTRONIC CLOCKS MERIDIANS AND PARALLELS OF LATITUDE Area in the left part from the entrance Exhibit: Interactive quadrant provided by the Museum of Royal Observatory, Greenwich Left lateral wall Text: LINES OF PARALLELS OF LATITUDE AND MERIDIANS Lines of parallels of latitude and meridians form a network seen on maps, globes and graphs. Parallels of latitude are imaginary circles parallel to the equator. They measure the distance to east and west from the prime meridian. Meridians are imaginary semicircles on the earth´s surface forming the shortest connecting line between earth poles. Parallels of latitude are formed by circles originated by intersection of earth´s surface and plane vertical to earth axis. Meridians give longitude and parallels give latitude running north and south from the equator. Meridians and parallels are measured in degrees. Each degree of latitude corresponds approximately to 111 km on earth´s surface. Distance among meridians differs according to latitude. The arc corresponding to one degree of longitude amounts to 111 km on the equator and towards poles it gradually reduces to zero distance. The equator is a natural zero point from which latitude is measured. There is no equivalent for the measurement of longitude. Therefore in 1884, the International Conference decided that the meridian crossing Greenwich near London (seat of the Royal Observatory) would be the prime/zero meridian. During that conference it was also agreed the international measurements and records of time. Thus the system of time zones was introduced. Illustration: Lines of parallels of latitude and meridians Illustrations (2x): Latitude and longitude are measured in degrees expressing the angle the vertex of which in the centre of Earth and its lines cross the measured points on earth´s surface. Legend: Declination and increase (the angle measured for the time before the star crosses the meridian and Sun or another star) give the position of stars by the same way as longitude and latitude on the Earth. Stars move on the sky towards the Sun and reach the highest point when crossing the local meridian. Astronomers are able to determine ascendancy and declination of stars by measurement of time when this coincides with height. The use of telescopes located on the equator allowed very precise measurements. If the position of a star is known the precise local time could be determined whenever it crosses the meridian. Note: In the left area of the room, on the wall, a photograph of the sculpture of the prime meridian. A metal band going from the sculpture on the photograph would continue by a metal band installed in the floor thus giving illusion of the zero meridian, which divides the Earth into the eastern and western hemispheres. Other photographs of galvanomagnetic Sheperd clock and the building of observatory would illustrate the atmosphere of one of the most important place of world chronometry. Text: PRIME MERIDIAN IN GREENWICH The Royal Observatory in Greenwich was astronomically active by 1952 when it moved into Herstmonceaux in Sussex. Later on, the observatory became the tourist attraction. The metal band was installed in yard pavement in 1960 and since that time tourists take their photographs when standing with each leg on different hemisphere. Photo: Photos of Greenwich, Createam archives. Front of the room left of entrance Text: TIME ZONES The Earth is divided into 24 time zones, each of 15 degrees of longitude. All countries of our planet are located in these zones. The system is based on the prime meridian in Greenwich. Time in each time zone is one hour ahead from the neighbouring zone to the west and one hour back to the east. E.g. 14.00 hours in Italy – 13.00 in England – 15.00 in Greece. Most geographically large countries, USA, Australia and Russia observed this system. Some countries, namely China, keep one standard time for the whole country. Local variations depend on political and geographic factors. For instance India has 30 minute-time differences. Some countries use the Summer Time (known also as "daylight saving time") so that in spring the time is one hour ahead and in autumn one hour back. In the European Union this time change is made on the last Sunday in March and the last Sunday in October. International Data Line The International Data Line is located on the opposite side of the prime meridian in Greenwich, at 180 degrees of longitude. People crossing it from west to east are a day ahead, those going from east to west have one more day of the same date. Illustration: The map of time zones Front of the room on the right from entrance Exhibit: Geochron Legend: GEOCHRON Geochron is the indicator of global time. It gives daylight and darkness on the whole world, at any time. With regard to Earth rotation, the situation changes any moment. On the geochron it is possible to determine manually the time of sunrise and sunset at any place in the world at any date in the past and future. Besides 24 standard time zones, geochron gives other 16 "nonstandard" zones, deviations from the standard division. Text: LONGITUDE AND TIME When Christopher Columbus sailed in 1492 across the Atlantic to discover America, no reliable measurement of longitude existed at that time when the shoreline disappeared. The majority of the world was unexplored and maps were inexact and incomplete. The development of trade and transport frequency faced a serious problem. Due to insufficient orientation and navigation the voyages had been prolonged, ships often lost and many voyages had finished by catastrophes. Therefore some countries offered a reward to those who could find a reliable method for the measurement of longitude. Illustration Legend: When one hemisphere has noon, the second hemisphere has midnight. Every 15 degrees of longitude equal to the difference of one hour. When a sailor wanted to determine his position east or west from his homeport, he had to compare the time at his actual position (by observation of the Sun and stars) with the time in his home at the same moment. But how could he determine in 1500 the time at home or homeport? One possibility was to take the clock with him on sea, but the first more accurate pendulum clock started to be used not until 1657. That clock functioned accurately on dry land, not at sea. Right lateral wall between two windows that should be blinded Text: ELECTRIC CLOCK The early development of electric clocks had been influenced by a long lasting era of mechanical clocks. In larger stable as well as smaller portable clocks the electric energy served for winding up the mechanical clockwork. Electric winding up was used in the clocks on towers as early as 19th century and in applied to the portable clocks in about 1952 together with the development of first reliable miniature thermocouples. In 1847, the Englishman Alexander Bain was the first designer of the really electric clock with electric contact controlling the pendulum. At the end 19th century, Swiss M. Hipp introduced the invention of free electromagnetic pendulum. Englishman R.J. Ruud continued that approach by disconnecting the mechanism registering number of pendulum swings thus preventing the interfering influences of another mechanism on the pendulum. A new system became the turning point in the development of accurate chronometers. For the first time in the history of chronometry, the stepping mechanism was replaced by the auxiliary pendulum. Construction of free electromagnetic pendulums culminated in the electric clock of W.H. Shortt. In 1927, the Greenwich Observatory calculated a mean daily error of operation of his astronomic clock for 1/300 second, which corresponds to one second per year. In 1952 the specialized papers reported on the starting production of electric watches by the firms Lip-Besancon (France) and Elgin Watch Co. (USA). Watches were at market after next 12 years. Exhibit: Electric wall clock, 1940´s (VMO) Exhibit: Electric clock BULLE (NTM) Exhibit: Electric clock ATO (NTM) Illustrative scheme to electric clocks Legend A scheme of Bain clock cooperating with the polarized impulse. The pendulum was kept in operation by polarized impulses given to the iron yoke of pendulum lens by two series solenoids. Polarity of magnetic field and intermittent attract and repel of the yoke was provided by electric contact on the pendulum. Electromagnetic counter recorded the number of swings on time scale of the dial. Text: ELECTRONIC CLOCK The changeover from electric to electronic clock is characterized by the replacement of a rather unreliable electric contact by electronic semiconductor – transistor. Functions of other components of electric and electronic clocks with balance wheel oscillators were almost identical. In 1961, the American firm Bulova Watch Company introduced a new type of wristwatches with mechanical tuning fork oscillator. It was a quite new concept and accuracy of those clocks was ten times higher than all other quality wristwatches. Time deviation was about one minute per month. Another important step was the introduction of electronic watches with quartz crystal. About 1975, analog and digital watches were at the market and their common commercial models were highly exact of error on one to two seconds per month. Developing laboratories of renowned watch firms started to deal with further miniaturization of electronic components, prolonged operating life and extended functional use. The top electronic wristwatch has over 20 functions, e.g. indication of time, day data, digit figure of moon, electronic calendar with auto-correction of month length, intermittent imaging of time and calendar date, acoustic alarm clock, acoustic time signalisation, stopwatch. Prior to the quartz wristwatch, quartz clocks had been used as laboratory instrument for scientific purpose. In 1960´s, quartz clocks replaced the mechanical and electric pendulum clocks in astronomical observatories and scientific workplaces. A daily deviation of a highly accurate quartz clocks was within 0.001 of the daily deviation of the most exact pendulum clock. Illustrative scheme of electronic clock with tuning fork oscillator Legend to the scheme The scheme of electronic clock with tuning fork oscillator: A new concept of electronic clock Accutron made by the firm Bulowa was exceptional in the following terms: A quite new oscillator in the form of a minute tuning fork with 25-mm arms. Tuning fork frequency of 360 Hz was exceptionally high - frequency was maintained by electronic circuit (see scheme). Permanent magnets were installed on both arms. Functioning was as follows: current goes through the coil, which attracts and repels the carrying containers of magnets from soft iron. Oscillation of arms results in alternating current giving impulses to the tuning fork at moments when magnet attract or repel coincides with oscillation of tuning fork. Sidewinding on one coil keeps synchronization. The main current circuit is formed by winding of this coil and another series coil. The secondary circuit with side synchronization winding and RC element is connected with the main circle by transistor. Both the circuits are fed by a miniature mercury cell of 1.3 V, which powers the watch for one year. Alternating current induced in the secondary circuit loads a condenser that is alternatively discharged and charged to the maximum capacity of the induced voltage. Electric current goes through transistor working as rectifier. At charge and discharge, transistor gives a current impulse into coils. Intermittent movement of oscillator is transferred mechanically by a click wheel from beryllium bronze with 300 teeth at the periphery, and there fit in the ratchet pawl on one arm of tuning fork. Click wheel makes one revolution for 0.833 second and is the most stresses component. Hands movement is provided through gearbox into click wheel. Later on, magnetic transfer of tuning fork oscillation on time indicator was developed. Accuracy of this type of clock was ten times higher than that of other wristwatches used so far (deviation of one minute per month). Quotation Most important about time is the fact that it passes. (Arthur Eddington) Space in the right part near entrance Text: METHOD OF LUNAR DISTANCE AND CHRONOMETER Constellation of Moon and other stars changes in a complicated but predictable way. In 1766 British royal astronomer Nevil Maskelyne published the first naval and navigation almanac (Nautical Almanac). It comprised many tables showing the position of Moon during 1767 if the observer stands in the centre of the Earth. The angular position of Moon and other bright stars was recorded in three-hour intervals of Greenwich time. In order to determine longitude, sailors had to measure the angle between Moon centre and a given star – lunar distance – together with height of both planets using the naval sextant. The sailors also had to calculated the Moon position if seen form the centre of Earth. Time corresponding to Greenwich time was determined using he nautical almanac. Then the difference between the obtained time and local time served for calculation in longitude from Greenwich. At the time of gradual development of the method of lunar distance, British government appointed the Board of Longitude in 1714 and offered a Great Prize of GBP 20,000.- to a man who would discover the measurement of longitude at sea with accuracy of a half grade of longitude. A devised chronometer was requested not to give deviation over 2.8 seconds per day. The task was solved after 40 years of work on it by John Harrison, a carpenter from Barrow in Yorkshire. The year 1770 was a turnover in world navigation. After centuries of uncertain longitude at sea, sailors could dispose of two methods. The first was methods of lunar distance using the sextant and the naval almanac showing time difference for Greenwich meridian. The second developed recently using a naval chronometer allowed a direct measurement of time difference among any place. Text JOHN HARRISON AND HIS CHRONOMETER (1693-1776) J. Harrison was a carpenter in small village Barrow where carpenter and smith had to know all kinds of handicraft. He was a self-educated clockmaker repairing clocks and later on he started to construct them. Harrison is an example of exceptional inventiveness and tenacity. He entered the competition of Great Prize and spent on it over 40 years. He constructed chronometers termed H1 to H4. In 1764 he performed the crucial test on the ship Tartar sailing from Portsmouth to Barbados. His chronometer H4 tested during the 47-day voyage made the error of 39.2 seconds, which was the result three times better than the request specified by the Board. However, Harrison obtained only half of the sum. The second part of the prize was said to be paid only under condition he would perform next tests, give all four chronometer to the Board and give details about the construction under oath. It was king George III, an amateur watchmaker and admirer of Harrison´s work, who pleaded so that Harrison received the second part of the prize, three years before death. The genius inventor, one of the greatest auto-didact in the history of handicraft and industry, laid the foundation for accurate time measurement and navigation. He contributed enormously to the development of world trade and transport and last but not least saved many lives at sea. He died in 1776 but his death passed unnoticed. Illustration: Portrait of John Harrison, his handwriting, the document of Great Prize, Harrison chronometer, scheme of chronometer step, booklet "Harrison" Quotation: The whole success in my life could be assigned to the fact that I always came a quarter before I had. (H. Nelson) Clock hands stood at eleven thirty for fifty years. Sailor´s is always open. (Dylan Thomas) ROOM 206 (68 m2) – FUTURE OF TIME Caption at the front FUTURE OF TIME Area on the left from the entrance into the room Text ATOMIC CLOCK Rotation of the Earth gives the basic scale of time – a day. This had been most reliable chronometer for millennia. But quartz and atomic clocks invented in 1930 and 1950 are much more accurate. The use of these extremely accurate clocks proved an irregular rotation of the Earth. In 1955, the first cesium-based atomic clock was constructed and thus allowed better definition of a second based on basic properties of atoms. Principle of atomic clock Atom can be illustrated as a minisolar system with a heavy nucleus in the centre surrounded by electrons on various orbits. Orbits correspond to energy levels and electrons move among levels only after absorbing or emitting an adequate energy. Such energy is absorbed or released in the form of electromagnetic radiation the frequency of which depends on energy difference between two levels. The transformation process is called "quantum jump" when the quantum means a slight but accurate energy necessary for electron jump into another level. The measurement of constant frequency of electromagnetic radiation thus allows the measurement of time. In other words, the atomic clock works by utilizing frequencies corresponding to the precisely defined quantum transitions between energy levels of molecules.. The astronomic time unit is there replaced by quantum unit. At the beginning, ammonium molecules were used as atomic oscillator. In 1950´s, cesium replaced ammonium. The first cesium clock was constructed in the National Physical laboratory in Teddington near London and its accuracy represented one second per 10,000 years. The actual atomic clock is even more perfect – one second fast or late during three million years. How long is one second? One second represents 9192631770 of cesium atom pulses or more accurately emission period corresponding to transition between two levels of a very fine structure of cesium 133 atom. Exhibit: A model of cesium atomic clock provided by the Royal Observatory in Greenwich. Text: How to observe time in the world? The whole world needs observation of the agreed time scale. On 1st January 1972, the Universal Time Coordination (UTC) was accepted as the official world time for our planet. BIPM is the official bureau observation of atomic time in the whole world. 65 laboratories with 230 atomic clocks all over the world observe the international time scale. World time is given as a mean of these atomic clocks. Whine BIPM counts seconds, astronomers continue in time measurement according to Earth rotation around its axis. Their data are compared with UTC and in case of the difference of over 0.9 second, one leap second is added or reduced in order to keep the time scales together. Quantum standards Quantum standards are based on basic properties of matter. In case of atomic clocks this is the energy released so that electrons move between the levels of energy of cesium atoms. It is difficult to use rotation of Earth for the definition of second because it changes to that second duration defined by this phenomenon would not be constant. Quantum standard are stable irrespectively of the place and time of measurement. Millennia in the future or distant galaxies, levels of energy of cesium atoms with be the same. The same will be the duration of second defined by this method. Left lateral wall Text: TIME LINE 3500 BC 1700 plus/minus 10 seconds per day 1762 plus/minus one second per three days 1930 plus/minus one second per 30 years 1955 plus/minus one second per 300 years 1980 plus/minus one second per 300 000 years 2004 plus/minus one second per 60 million years Illustration: material of British NPL sundial pendulum clock Harrison´s chronometer Quartz original atomic clock cesium clock cesium years Text: NAVIGATION TIME LINE Celestial navigation 2nd century BC – Sun, Moon and stars are used for navigation since the time of ancient sailors to present Magnetic compass 11th century – the Chinese invented the first magnetic compass using magnetic ferric oxide Astrolabe 15th century – the astrolabe was used for the measurement of the distance of stars and planets. Columbus used the astrolabe during his voyage to America Sextant 18th century – the sextant was used for the measurement of the distance of celestial bodies; used along with time for finding the position of a ship Harrison´s chronometer 18th century (1764) – accuracy of one tenth of second per day for the determination of longitude Radar system Half of 20th century; detection of objects using transmitted and reflected radio waves Global Positioning System (GPS) End 20th century – global network of 24 satellites Galileo 21st century – European Global Navigation Satellite Systems (GNSS) Illustration: material of British NPL Quotation: Accuracy is the thief of time (Oscar Wilde) Left lateral wall – right to the exit from the room Text: FUTURE OF TIME Since Einstein´s theory of relativity the scientists have been trying to penetrate into time mysteries. Numerous questions arise. Could different kinds of clocks measure different types of time? Does natural chronology exist for the Universe as a whole? Was there the beginning of time? Will time end? Is it possible to travel in time? If yes, how solve paradoxes related to the travel to the past? However, many questions remain open, many doubts persist. The revolution set by Einstein has not been finished yet. The theory of relativity survived at least six attempts to nullify it. Validity of this theory is now examined by satellites dealing with the character of space and time, as well as deformation of the Earth. Even Stephen Hawking, a renowned physicist and author of the bestseller "A Short History of Time" is not quite certain, revises his own theory and presents a new concept of back holes in the Universe. The key to the knowledge of the Universe probably lies in the knowledge of time. Will the mystery of time be revealed? TIME WILL SHOW "… Personally I am certain that we are closer to the revolutionary historic moment when our knowledge of time will advance. Einstein left us an important idea: he proved that time is part of physical world and postulated an excellent theory, which connects inseparably time with space and matter. During 20th century, scientists studied thoroughly the consequences of Einstein time, both theoretically and experimentally. They faced several disquieting and bizarre possibilities and some of them were even found as correct solutions. But they also met serious obstacles still preventing a good understanding of time. This indicates that Einstein´s revolution remains unfinished. I hope that the science of 21st century will consider it as the most important challenge." Paul Davies, British physicists, Professor of Cambridge, London, Newcastle upon Tyne (Great Britain) and Adelaide (Australia) awarded the Templeton prize for intellectual achievement. Quotation: What we call imaginary time may be in reality the basic and what we call basic time may be just an imagination made by us to use it for description of the Universe. (Stephen Hawking) So is Einstein´s theory a sort of crazy caprice? Certainly yes. (New York Times, 1921) Front wall of the room Title: GALLERY OF 21ST CENTURY Note: The Createam elaborated the list of 55 top world watchmakers with the intention to approach and ask them to provide their "flagship products", the best product in terms of technologic development and design at the beginning of the present century, i.e. wristwatches of high quality, very attractive for visitors but at the same time under high security. Gallery of top producers would harmonically balance the technological concept of the passage. Text: Engine-inspired watches Connection between Swiss watchmaker's firm Tag Heuer and the Formula 1 car racing has a long traditions. Many famous racing drivers have watches of this firm (e.g. Senna, Coulthard, Raikkonen, Montoya). The model Monaco V4 illustrates a direct inspiration by engines; watch hands are powered by belting, not toothed wheels. This model was awarded many prizes for design and will appear at market in 2006. The authors of the revolutionary design are Jean-François Ruchnnet, micro mechanic and Philippe Dufour, master watchmaker. In addition to belting powering (13) instead of toothed wheels, this model is protected by 21 patents. The most marked innovations are the linear instead the traditional circular movement of the oscillation body into linear and replacement of ruby jewels by ball bearings (the smallest is of only 2.2 mm in diameter). Beltings used are made from special material the composition of which is a military secret. They are broad 0.5 mm and thick 0.45 mm and their expected carrying capacity is 40 kg. The backside is from sapphire to let show "the engine", similarly as Ferrari. The clockwork reminds the engine in arrangement. The code V4 also refers to Formula 1. Right lateral wall where two windows should be blinded Text: BINOCULARS AND TELESCOPES During a long history of observation of celestial bodies, astronomers had to use mostly their eyes. At the beginning of 17th century, binoculars had been widely used. In 20th century, advanced technology used for production of binoculars and telescopes allowed some important discoveries. In 1918, the observatory of Mount Wilson in California finished the assembly of Hooker´s binocular with the mirror objective of 2,5 metres in diameter and it helped to solve one basic dispute about universe structure. Even in 1920´s, astronomers differed in the definition of nebulae. Two major theories existed. The first one postulated that the galaxy Milky Way consisting of billion stars, including the Sun, was the main galaxy in the whole universe. The second theory postulated some nebulae as isolated large galaxies similar to Milky Way in immense distances. The question was solved in 1924 when American astronomer Edwin Hubble used a mighty objective in the observatory in Mount Wilson and could discern individual stars in nebulae. He observed changed brightness and assessed the distance of Andromeda nebula to about million light years. That meant that Andromeda is behind the periphery of Milky Way, thus being an autonomous galaxy. Astronomers agreed that the universe is much more greater they thought previously. Hubble reported on distances of nine different galaxies. At present it is known that the actual telescopes can detects light of billion galaxies, each of them containing billion stars. We have been living on a star isle of 100 000 light years in diameter and slowly turns. When Hubble confirmed the existence of other galaxies, he focussed on records of their distances and investigation of spectrum. Even in 1920´s, astronomers differed in the definition of galaxy. Two major theories existed. The first one postulated that the galaxy Milky Way consisting of billion stars, including the Sun, was the main galaxy in the whole universe. The second theory postulated some galaxies as isolated large galaxies similar to Milky Way in immense distances. The question was solved in 1924 when American astronomer Edwin Hubble used a mighty objective in the observatory in Mount Wilson and could discern individual stars in galaxies. He observed changed brightness and assessed the distance of Andromeda galaxy to about million light years. This means that Andromeda is behind the periphery of Milky Way, thus being an autonomous galaxy. Astronomers agreed that the universe is much more greater they thought previously. Hubble reported on distances of nine different galaxies. At present it is known that the actual telescopes can detect light of billion galaxies, each of them containing billion stars. We have been living on a star isle of 100 000 light years in diameter and slowly turns. When Hubble confirmed the existence of other galaxies, he focussed on records of their distances and investigation of spectrum. That investigation led to the surprising finding that most galaxies go away from our planet. The more distant is the galaxy from the Earth, the more quickly goes away. This suggests that the universe cannot be static but on the contrary it expands: distance among galaxies increases with time. The discovery of universe expansion was a crucial turning point for investigation of universe and time. Exhibit: Binocular or telescope – none at present Illustration: Photograph or scheme of Hooker´s telescope of Mount Wilson Area right to the entrance into the room Text: GPS Why do we need the accuracy of atomic clock? Measurement of time became the basic part of day-to-day life and the accuracy of minute or several seconds is usually sufficient for any human activity. But the extremely accurate time is decisive in many other fields. The GPS satellites (The Global Positioning System) emit time signals from atomic clock aboard thus allowing cars, ships and airplanes to detect their position with accuracy of several meters. GPS is widely used by ecologists for monitoring of rare animals, geologists, scientists, mountain climbers, and rescue teams. Future positioning systems are expected to operate with accuracy of millimetres. Whether people are surfing on Internet or phoning, telecommunications request accurate time providing the delivery of digital news to destination. Highly important is also the accurate time record of financial transactions. Principle of atomic clock In 1955, Louis Essen constructed the first cesium atomic clock. At present, a new model of atomic clock has been used, the so-called cesium fountain. In this model a cloud of atoms is emitted into a microwave and then drops due to gravitation. The fountain uses the laser beams to delay atoms. A slow movement of atoms allows a more accurate measurement The clock of 21st century has been developed in the form of captured ions. Ions are charged atoms that are captured almost indefinitely by electromagnetic field. As soon as they are captured, the laser beam may be used for cooling down of ions almost to the absolute zero thus immobilizing them. Ytterbium was used for ion-based clock because this element is very stable. This type of clock is thousand times accurate than the best common atom clock and their accuracy equals to the loss of one second in the whole history of the universe. SATELLITE NAVIGATION Navigation, the knowledge of locating the position and plotting the course of travelling through or over has been developed for millennia in order to explore the world and develop trade. Compared to the ages when navigators had to compare the position of stars for plotting the course of a ship, today are decisive satellites giving precise navigation information. The global navigation satellite system (GNSS) based on constellation of satellites revolving around the earth thus providing the worldwide information about position, speed and time data necessary for successful navigation. These data have been used in transport, telecommunication, engineering, control and protection of environment as well as safety and protection of inhabitants. GNSS consists of a system of satellites, ground control stations and receivers. The most known GNSS is the global positioning system (GPS) covering 24 satellites controlled by the United States Air Force Space Command. Although primarily developed for military purposes, it has been now utilised by million people all over the world for air, land and sea navigation. Principles of GNSS Navigation requires a correct location of a given position. The satellite navigation gives accurate location by measuring the distance towards at least four known reference sites., i.e. positions of each satellite on its orbit at any time. The GNSS receiver in the unknown position on earth retains in its memory an actual position of all satellites in the whole satellite system. Each satellite emits continuously a coded signal recognized by a receiver. The receiver measures time of radio signal coming. The receiver then reads the distance of "action radius" form the satellite. When the receiver knows the position of a satellite as well as the time of signal coming to an unknown position, than it is able to calculate the distance between the satellite and the receiver. The speed of radio signal equals to light speed, which is constant – 299 792 458 meters per second. Thus, the difference from a satellite to the unknown position is calculated according to the following equation: Speed x time = distance To calculate a correct position of a land transmitter, it is necessary to know the distance given by four satellites. Four satellites allow positioning of ten-metre accuracy. Measurement of flight time GNSS operates due to accurate cesium and rubidium atomic clock aboard every satellite. An extremely accurate clock can control the signal code and measure its flight time. Each satellite has its marked code signal. Satellite signal is delayed by land flight. Although satellites circulate 20 000 km above the earth, radio waves of light speed take one tenth of second of coming to earth. This means, the more, the best. To receive on land the signals of at least four satellites, a receiver should receive signals of 24 satellites on their orbit. The more satellites operate, the more accurate and reliable is positioning. GNSS – general-purpose help GNSS can be used for navigation in cities by means of cellular phones. It is used in search for stolen cars and environment monitoring. In combination with mobile communication technologies, GNSS can provide the actual information about the position of cars, transport continuity and people under danger. Blind people can be given special personal navigation tools allowing their movement in cities. Environmentalist can consult the portable GNSS for navigation and identification of plants and animals. GNSS combined with a radio set can be used for monitoring of wild animals and their protection. GNSS in 21st century At present, GNSS is the only system requiring 24 satellites. The European Union and European Space Agency (ESA) construct a new GNSS system called Galileo. In 2008, the Galileo constellation will comprise 30 satellites together with GPS. Using a dual receiver, people could combine GPS and Galileo system and use 15 to 20 satellites determining the position with deviation of 10 cm. Exhibit: GPS apparatus Illustration: NPL materials, schemes of GNSS system ROOMS 202/203 (about 50 m2) Text on the frontal wall OLOMOUC REGION IN THE CONTEXT OF EUROPEAN WATCH-AND-CLOCK MAKING Area in the left from the entrance into the room Text: EUROPEAN CLOCK MAKING In the first half of 16th century, France was decisive for European clock and watch making. From the first watchmaker centre in Blois (1518), the craft spread into many French towns. Many professions participated in clockmaking: smiths, locksmiths, foundrymen, bell-casters, sculptors, stonecutters, goldsmiths and painters. In the second half of 17th century, France was well ahead of other countries. England gave the world the brilliant scientist Isaac Newton who used time in his mathematical calculations and movement studies. He continued the work of Galileo and summarized his results into three laws of motion. He even pointed out that the laws of motion would be governed by the law of gravitation. Thus he changed the concept of universe. Those laws had been accepted for 200 years until Albert Einstein confounded Newton´s theory of absolute time by his special theory of relativity. England also contributed to the technical development of clockmaking by crucial inventions of escapement (Mudge, Graham, Earnshaw) and solution of temperature compensation of the pendulum (Graham). Highly important was a successful construction of naval chronometer constructed by a gifted autodidact John Harrison. He and his excellent successors (Earnshaw, Frodsham, Sewill and others) contributed significantly to the accurate determination of longitude at sea navigation. An early development of European clockmaking was influenced also by Germany, namely two centres in Nuremberg and Augsburg. Those centres had been founded at the beginning of 16th century and accounted for the flowering of mechanical clock manufacturing. French and German clockmakers developed several unique technologies. Exhibits of French and German clockmaker works are shown in Deutsches Uhrenmuseum in Furtwangen, Schwarzwald. The most renowned European clockmakers were Swiss craftsmen who became popular for technical and art handicraft. Swiss and French clock-making share many common features due to thousands French emigrants who settled in Geneva and other Swiss towns after the Edict of Nantes at the end of 17th century. The crucial invention in the history of mechanical clocks was made in Holland where Christian Huygens constructed the first pendulum clock. Again, the cancellation of the Edict of Nantes in 1685 resulted in the coming of may French refugees-clockmakers. New clockmaking centres were Amsterdam, Leyden, Rotterdam and Utrecht. Belgium was also important in European clock-making history. The oldest mechanical clock had been constructed there in 1340. Of Italian clockmakers, important was Giovanni de Dondi. The crucial personality was Galileo Galilei who discovered the properties of the pendulum and pointed out its importance for chronometry at the turn of 16 th and 17th century. First mechanical clocks document a rich history of clock-making in the Apennine peninsula in 1314-1318 and public municipal clocks installed in many Italian cities, e.g. Orvieto (1334), Modena (1343), Monza (1347) and Padua (1364). The centres of clock making in Austro-Hungary were Vienna and Prague. The first references on clockmakers and constructors of astronomical clocks at the royal court in Prague, Bohemia, date to the end of reign of Charles IV. and the beginning of reign of Wenceslas IV. Exhibit: Table clock, signed Franz Hekel in Wien, 1840´s – VMO Exhibit: Table pillar clock, signed Osthalder in Wien, first half of 19th century – VMO Exhibit: Table chine clock, France, 2nd half of 19th century – VMO Exhibit: Wall pictured clock with a motive of Alpine countryside, inscription "Disperthal", about 1850 – VMO Exhibit: Table clock Atmos, Switzerland, 1970´s – VMO Area right from the entrance into the room Text: CLOCK-MAKING IN BOHEMIA Clock-making in Bohemia enjoys an excellent reputation, starting with the Prague astronomical clock made by Mikuláš of Kadaň dated to 15th century or Prague Loreta with charming carillon made by Petr Neumann in 1694. Czech clock-making developed in harmony with European clock-making, especially in Germany, France and Switzerland. Out of Czech clockmakers, renowned were Jakub Čech (?-1540), Jan Klein (1684-1762) constructor of the astronomical clock in Prague Clementinum, Sebastien Landesperger (18th century) at the imperial court. Significant was the reputation of the clockmaker families of Biswanger, Treffler, Engelschalck and Balke. In 19th century, renowned were Josef Boţek (1782-1835), versatile technician and inventor, and his disciple Josef Kossek (1780-1858). A well-founded handicraft base had been made. In 1786, 14 Czech regions comprised over 80 clockmaker masters with their journeymen and apprentices who belonged to the clockmakers´ guild and were divided into grand-clockmakers, small-clockmakers and country masters. In the course of 19th century, several clock-making workshops gained in importance and started their industrial production, e.g. the firms L. Hainz and C. Suchý and sons. Local branches of German firms also markedly participated in the industrial production of clocks in Bohemia (Kienzle in Chomutov and G. Becker in Broumov). Quotation: Time reveals truth Lucius Annaeus Seneca Right lateral wall Text: ŠTERNBERK The town is located 16 km north to Olomouc and was founded in 1396 at the foot of the castle watching over important trade paths. The town displays many historical monuments, excellent handicraft traditions and scenic beauty. Due to the tradition of handicraft, clock-making manufacturing and collection of chronometers, Šternberk was called "The Town of clocks and time". Clock-making tradition of Šternberk is documented by\ collections of reserved clocks. In 1773, Italian Faselli constructed for the Šternberk monastery the equatorial sundial. The table pillar clock signed "Franz Flanke Sternberg" date to the first half of 19th century. During 1947-2000, a going factory Chronotechna had produced a large scale of mechanical alarm clocks. From 1960 to 1990 there was the Museum of Clocks as a branch of the Museum of National History in Olomouc. The Time Exhibition is intended to continue the tradition of the Museum of Clocks. Illustrative photograph of Šternberk Products of Chronotechna – all exhibits of VMO Exhibit: A table alarm clock for blind people, Chronotechna Šternberk Exhibit: A wall clock with a rope at the periphery, 1950´s Exhibit: A wall wooden clock, 1960´s Exhibit: A wall Bakelite clock, 1960´s Exhibit: A wall Bakelite clock, 1960´s Exhibit: A wall children clock with a figure of football player, 1960´s Exhibit: A wall metal clock, 1970´s Exhibit: A wall electric plate clock, 1970´s Exhibit: A travelling alarm clock in leather case, 1960´s Exhibit: A table clock, 1960´s Exhibit: A table alarm clock, 1960´s Exhibit: A children alarm clock with picture-face, 1970´s Exhibit: A jubilee alarm clock No. 25 000 000 produced by Chronotechna Šternberk Exhibit: A table alarm clock – a tyre, 1950´s Exhibit: A table alarm clock, 1960´s Exhibit: A timer, 1960´s Exhibit: A timer, 1960´s Exhibit: A table alarm clock, 1970´s Exhibit: A table alarm clock in a wooden case, 1960´s Front wall of the room Text: OLOMOUC The capital of Olomouc region, industrial, trade and cultural centre of Central Moravia. An important transport crossing and one of the historically most interesting towns in the Czech Republic. It was settled as early as in Neolithic times and since 11th century became the most important seat of Moravian Přemyslides. In 1063, the bishop´s seat was founded there and in the reign of Wenceslas I. (1205-1253) Olomouc became the Royal City. Until 1641 it was the capital of Moravia. Olomouc is a urban historical reservation area. The Olomouc Museum of National History offers a unique collection of chronometers. Some illustrative photographs of Olomouc: UNESCO monuments, the Olomouc astronomical clock (the historic and actual versons) DEVELOPMENT OF CLOCKMAKING IN OLOMOUC REGION The clock manufacturing in Olomouc region enjoys a rich tradition, which dates back to the second half of 14th century. The city of Olomouc can be assigned, along with Prague, as the most important centres of clock-making industry in Bohemia. The importance of Olomouc as a clock-making centre is documented by the archives reporting on local clockmakers. In the course of one century, over hundred clockmakers had been recorded. The oldest record about a clockmaker in Olomouc dates back to 1392 when a man called Nicolas is described as "rector orologii", i.e. administrator and maintenance man of the municipal tower clock. In 1468, there had been 8 clockmakers in Olomouc, almost the same number as in Prague. Since 16th century, the presence of clockmakers has been documented continuously. Among other medieval handicrafts, clock-making had been highly specialized and creative. Similarly to other craftsmen, clockmakers had been organized in a guild. First, they had common articles (rules appearing in press in 1574, 1671 and 1751) with other handicrafts dealing with precision mechanics (locksmiths, armourers, screwers); from 1793 an independent guild of clockmakers has been documented in Olomouc. Of important representatives of clock-making handicraft in Olomouc it should be mentioned Hanuš Pohl who participated in the reconstruction of the Olomouc astronomical clock during 1570-1575, Martin Vogt who created various types of Baroque clocks during 1729-1745, Josef Radda who made besides common clocks numerous beautiful table astronomical clocks and figurative clocks. The clocks made in Olomouc clock-making workshops are comprised in numerous public and private collections in Bohemia and abroad. Exhibit: Machine of tower clock in a wooden box, sign. Theodor Jankowsky in Olmutz, end of 19th century – VMO Exhibit: Table box clock, sign. F.X. Bayer Olmutz, about 1750 – VMO Exhibit: Grandfather clock, sign. Martin Vogt in Olmutz before 1745 – VMO Exhibit: Wall picture clock, sign. Carl Balzarek in Muglitz before 1850 – VMO Exhibit: Wall pendulum clock, sign. Ignatz Friedman, Kremsier, second half of 19th century – VMO Exhibit: Table clock with automats in the form of Olomouc Town Hall, end 19th century – VMO In the centre of front area the picture of Olomouc astronomical clock Text: OLOMOUC ASTRONOMICAL CLOCK In addition to archival documents about clockmakers and their guild in Olomouc, the importance of this city as a clock-making centre is supported by the fact that since the end of 15th century the astronomical clock was located at the Town Hall. It and the older and more famous Prague astronomical clock had been the only two pieces of astronomical clocks in Bohemia. The astronomical clock can be defined as the artistically created public clock, which gives not only basic time data, but also movement of celestial bodies completed with moving figures and sound effects. The astronomical clock is considered as the top of clockmaking craftsmanship; is creation and maintenance required special technical, astronomical and art knowledge and skills. In the course of centuries, the Olomouc astronomical clock had been restored many times. Except its internal mechanical system that remained almost the same from the end of 16th century to 1898, the external appearance had changed reflecting Gothic, Neogothic; the worse restoration was made in 1947-1955 in the style of Socialist realism (the original decoration was removed and put into the museum). Exhibit: Model of the central part of Olomouc astronomical clock, 19th century – VMO Exhibit: Figure of an armed man, Olomouc astronomical clock, 1810-1811 – VMO Exhibit: Model of a sportswoman by M. Svolinská, Olomouc astronomical clock, 1955 – VMO It is recommended to make a copy of the Planisferium by Pavel Fabricius, flame-gold copper dated 1573-1575. On the left side of the corridor going out the room and leading back to the hall of mechanical clocks there will be an information board about the secondary watchmakers school and vocational school, the watchmaker school in Jihlava the only school of this type in the Czech Republic. This is a highly specialized branch suitable, among others, for disabled people. 3. NP – 2nd FLOOR The original loft offers a multifunctional zone characterized by openness, flexibility and variability so typical of TIME. The area requests to be projected as freely as possible not closing any way of utilization. If divided, such segmentation should be in the form of movable and structural systems commonly used in multifunctional facilities. The topics will cover the zones of various activities designed for children. 1. TIME OF PLAYS The zone of children and occasion for plays. Toys - A big pendulum hanging from the roof, equipped with a seat and serving as a big swing. - The inside of the clock, wooden machine serving as a climbing frame. At the top of the face a hole for a cuckoo where appear children who climbed up and then slide the chute. - A wooden turtle "Lazy Time" with the face and seat on the shell, down there will be wheels. Children can push off and go on it. The do-it-yourself corner Small watchmakers compose wooden elements like Lego thus forming various magic clocks. Magnetic puzzle, skilfulness competitions. Globes Replicas of globes of earth and star sky Amusing drawings Drawings by J. Koutský and J. Slíva give a humorous character to this area and deal with time and its measurement. Topics "Dialog between a dayfly and a turtle", "Sandglass in our bodies", "Race with Time", "Mechanical Sandglass" may complete the area TIME OF PLAYS. Sketchpads for children who can draw there. The pictures use for exhibition. 2. Carillon competition Skilfulness competitions for children and adults. Two lines on the floor, above them the bells of various shapes and materials are hung. Competitors should move through the bell trap to avoid any ringing. Bells will be installed on the basis of financial contributions – gifts of Šternberk citizens for "their" exhibition. Each local visitor will feel there as "kindred spirit". This play-competitions may express "city relations" of citizens and town institutions. Time limits expressed by GIANT SANDGLASS. 3. Time messengers Pictorial, fairy-tale figures of time messengers in flat or three-dimension make: Bell-ringer One of the oldest messengers and time heralds like Quasimodo. Night watchman Classical interpretation according to Josef Lada or modern like Werich´s watchman Jehan meditating on time in the famous forestage. Artilleryman The gunman who reacted by the flag sign from the old Klementinum observatory by gunfire thus announcing midday from 1842 to 1928. Muezzin Original, exotic, oriental messenger of time from a minaret. Cock The cock and crowing – typical of country life. Creation of figures and toys could be an occasion of local artists. 4. Gallery The area long the wall designed for temporary exhibitions of artists, children and partner institutions . 5. Multifunctional arena The mini-amphitheatre, a multifunctional area for social, cultural, educational activities or conferences. Movable components and mechanisms, or audiovisual devices (Projection wall BARCO) allow a rapid change of the space. Films – video-arena Special short animated films Topics: - What can be done in one second (Human life, Czech history, History of mankind, Evolution, Universe evolution) Str. 6-13 BASIC COMPOSITION OF TIME EXHIBITION I. 1 NP - BASEMENT Not recommended for permanent exhibition because of technical-operational reasons. Suggested utilization: technical background, storage, archive, refreshment room, a shop or place for temporary exhibitions. This will be decided about later on with investor´s representatives II. 1. NP – GROUND FLOOR COSMIC TIME – CREATION OF TIME Universe Solar system – the Sun Earth Galaxies Moon Stars Stonehenge NIGHT AND DAY – CALENDARS Seasons Rituals Cultures THE OLDEST CLOCK Sundial Water clock Fire clock (wick, fuse) Sand clock Armillary sphere Earth´s globe Star sky globe SEARCHING THE TIME Personalities (in philosophic sense) Discoveries Maps Pendulum, telescope III. 2. NP – 1st FLOOR MECHANICAL CLOCK The front of Prague astronomical clock – a copy Tower clock Bells Mural clock Table clock Floor clock Portable clock Functional elements of mechanical clocks (driving and gearing mechanism, escape mechanism, oscillator, demonstrating part, bridges) SPECIAL CLOCK) Special clock Watchmaker shop Watchmaker machines and apparatuses TIME PHENOMENON Time in music Time in arts Time in medicine Time in fashion Time and society ELECTRIC AND ELECTRONIC CLOCK GREENWICH Interactive quadrant for longitude determination Time zones Geochron Longitude and time Harrison TIME FUTURE Atomic clock GPS system Telescopes and observatories Modern time measurement Binoculars and telescopes Time line EXCLUSIVE GALLERY OF TIME OF 21ST CENTURY (top of 20-30 world-renowned producers and brands of exclusive wristwatches) OLOMOUC REGION IN THE CONTEXT OF EUROPEAN WATCHMAKING IV. 3. NP – 2ND FLOOR - LOFT TIME OF PLAYS CARILLON COMPETITION TIME MESSAGERS GALLERY FOR TEMPORARY EXHIBITIONS MULTIFUNCTIONAL AREA (amphitheatre, arena, projection) CAFÉ Background Str. 9 Plánek Sketchmap COSMIC TIME THE OLDEST CLOCK DAY AND NIGHT CALENDARS SEARCHING THE TIME Str. 10 MECHANICAL CLOCK OLOMOUC REGION SPECIAL CLOCK WACHMAKER SHOP PHENOMENON OF TIME GREENWICH ELECTRIC AND ELECTRONIC CLOCK FUTURE OF TIME Str. 11 TIME OF PLAYS Str. 12 Exterior of the building TIME EXHIBITION The graphic representation of the exterior of the building – harmony between the architecture of the object and the aesthetically acceptable attracting 1. South front (arrival to the town from Olomouc direction) Inscription in Czech EXPOZICE ČAS in English TIME EXHIBITION South front – there will be located (and illuminated in the evening and at night) SUNDIAL 2. North front A continuous band with the term TIME in various languages: ČAS – TIME – ZEIT – TEMPS – TIDE – TEMPO – TIEMPO (also in Chinese, Japanese, Arabic) 3. WEST FRONT – MAIN ENTRANCE INTO THE EXHIBITION Inscription: TIME EXHIBITION Graphic stylisation SUN AND MOON In the front area before the building there with be a replica of the stone obelisk – GNOMON – high about 2.5-3 metres, stylisation of first sundial used by Egyptians for time determination as early as 15th century BC. The obelisk will be illuminated as a dominant attraction in the evening and at night. OBELISK – PIN Text: An obelisk – gnomon – a column or pin on a sundial that casts a shadow indicating the time of day. Egyptians used those obelisks for adoration of the God of Sun. First obelisks and pins designed for time measurement in Egypt date to 14th century BC. Str. 17 4. SOCIAL-SANITARY ROOMS AND OPERATIONAL BACKGROUNG (103-107) 5. 6. CORRIDOR – ENTRANCE TO THE EXHIBITION AREA (109) EXHIBITION – GROUND FLOOR (111-114) COMPOSITION OF EXHIBITION AREA IN 1. NP – GROUND FLOOR 111 – COSMIC TIME 112 – NIGHT AND DAY – CALENDARS 113 – THE OLDEST CLOCK (NON-MECHANICAL CLOCK) 114 – SEARCH THE TIME (DISCOVERIES AND DISCOVERERS) CONTENT AND VISUAL CONCEPT OF THE EXHIBITION ON GROUND FLOOR The external light effects will be shadowed in favour of the internal artificial light regime defined by the artistic project. Individual artistic concept and stage adaptation will be harmonized with dominant real exhibits or replicas. In case of missing exhibits, the graphic presentation will replace them. Str. 18 COSMIC TIME NIGHT AND DAY CALENDARS THE OLDEST CLOCK SEARCHING THE TIME Str. 19 UNIVERSE Str. 47 CALENDARS Str. 63 CALENDARS Str. 64 THE OLDEST CLOCK Str. 76 SEARCHING THE TIME Str. 88 MECHANICAL CLOCK OLOMOUC REGION SPECIAL CLOCK WATCHMAKER SHOP PHENOMEMON OF TIME GREENWICH ELECTRIC AND ELECTRONIC CLOCK FUTURE OF TIME Str. 89 MECHANICAL CLOCK Str. 110 Note: In the area of mechanical clocks where walls are high (4.25 m), the area can be used for location of poetic texts stressing the cultural and aesthetic character of clocks and harmonize the technical nature of the whole topic. Str. 110-113 – verše v češtině Str. 114 PHENOMENON OF TIME Str. 133 MERIDIAN Str. 144 Illustration: Exhibit: A naval chronometer, sign. James Rdwards, Near the West India Docks London, 18th century, 14.5x14.5x13.5 cm, face diameter 7.5 cm. VMO Exhibit: A pocket chronometer, sign. Dent, London, half of 19th century, 5.5 in diameter, 1.8 cm in depth. VMO Exhibit: A chronometer in wooden case, sign. "Cortébert" Switzerland, 2nd half of 19th century. VMO Str. 147 FUTURE Str. 154 Future of time. Each exhibit will be provided with description supplied by the producer. Contacts with producers of top clocks may lead to sponsorship-based cooperation. The list of firms – text and illustrations: Str. 155: Note: The Gallery of 21st century will comprise also the exhibit of the firm Tag Heuer provided with description. Str, 162: OLOMOUC ŠTERNBERK Str. 174 - time lost - to have time - race against time, etc. Films on related topics (e.g. The Creation of World, Modern Times). 6. 7. CAFE SOCIAL-TECHNICAL BACKGROUND Str. 175 TIME OF PLAYS Obrázky: SUNDIAL IN OURSELVES DIALOG BETWEEN A TURTLE AND A DAYFLY RUN FOR DEAR LIFE