In astrology, a triplicity is a group of three signs belonging to the same element. Trines Western astrology assumes that each sign of the same triplicity is 120 degrees apart, forming angles to one another called trines, which are each equivalent to the 360 degrees of the circle divided by three. Trines are considered to be very powerful and yet very comfortable, free-flowing connections. This suggests that the signs in each element are very comfortable and compatible with one another and tend to have many of the same qualities in common. Method of organization In traditional astrology, the concept of triplicity embodied several factors concerning the four classical elements and were considered of particular importance. Besides the four classical elements, two other ways triplicity could be organized were by rulership type and by season. However, neither are given much attention by modern astrologers. However, astrology by season, in particular has been adopted by astrologers who practice in modern Neopaganism, Druidism and Wicca. Classical elements In traditional Western astrology there are four triplicities based on the classical elements. Beginning with the first sign Aries which is a Fire sign, the next in line Taurus is Earth, then to Gemini which is Air, and finally to Cancer which is Water—in Western astrology the sequence is always Fire, Earth, Air, & Water in that exact order. This cycle continues on twice more and ends with the twelfth and final astrological sign, Pisces. The elemental rulerships for the twelve astrological signs of the zodiac (according to Marcus Manilius) are summarized as follows: Fire — Aries, Leo, Sagittarius - hot, dry Earth — Taurus, Virgo, Capricorn - cold, dry Air — Gemini, Libra, Aquarius - hot, wet Water — Cancer, Scorpio, Pisces - cold, wet Rulerships In traditional astrology, each triplicity has several planetary rulers, which change with conditions of sect—that is, whether the chart is a day chart or a night chart. Triplicity rulerships are a very important essential dignity—one of the several factors used by traditional astrologers to weigh the strength, effectiveness and integrity of each planet in a chart. Many Hellenistic astrologers (for example, Dorotheus of Sidon) considered triplicity rulership the most powerful and demonstrable of the several essential dignities of a planet. Triplicity rulerships (using the "Dorothean system") are as follows: <div style="font-size:90%">* (Ptolemy later modified the rulerships of Water triplicity, making Mars the ruler of the water triplicity for both