was said to have changed himself into a horse to escape his jealous wife, Rhea, and tutor to Jason. As there are two centaurs in the sky, some identify Chiron with the other constellation, known as Centaurus. Or, as an alternative tradition holds, that Chiron devised the constellations Sagittarius and Centaurus to help guide the Argonauts in their quest for the Golden Fleece. A competing mythological tradition, as espoused by Eratosthenes, identified the Archer not as a centaur but as the satyr Crotus, son of Pan, who Greeks credited with the invention of archery. According to myth, Crotus often went hunting on horseback and lived among the Muses, who requested that Zeus place him in the sky, where he is seen demonstrating archery. The arrow of this constellation points towards the star Antares, the "heart of the scorpion", and Sagittarius stands poised to attack should Scorpius ever attack the nearby Hercules, or to avenge Scorpius's slaying of Orion. Terebellum On the west side of the constellation, Ptolemy also described the asterism Terebellum consisting of four 4th magnitude stars, including the closest and fastest moving member, Omega Sagittarii. Astrology , the Sun appears in the constellation Sagittarius from 18 December to 18 January. In tropical astrology, the Sun is considered to be in the sign Sagittarius from 22 November to 21 December, and in sidereal astrology, from 16 December to 14 January. See also Sagittarius (Chinese astronomy) Notes References External links The Deep Photographic Guide to the Constellations: Sagittarius Star Tales – Sagittarius Find Sagittarius in the Night Sky The clickable Sagittarius Warburg Institute Iconographic Database (medieval and early modern images of Sagittarius) Constellations Southern constellations Constellations listed by Ptolemy