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Aquarius is a constellation of the zodiac. Its name is Latin for, water-carrier or cup-carrier. It is one of the 48 constellations described by the 2nd century astronomer Ptolemy, and remains one of the 88 modern constellations defined by the International Astronomical Union. Aquarius is the eleventh astrological sign in the Zodiac, originating from the constellation Aquarius. It spans the 300-330th degree of the zodiac, between 305.25 and 332.75 degree of celestial longitude, which In the Tropical zodiac the Sun transits this area on average between January 21 to February 18 each year. Poeticon astronomicon is a star atlas whose authorship is disputed. The work was originally attributed to the Roman historian Gaius Julius Hyginus (64 BC - AD 17). The book lists most of the constellations in the same order as Ptolemy's Almagest (2nd century AD) which has led many to believe that a more recent Hyginus created the text. The Poeticon astronomicon was not formally published until 1482, by Erhard Ratdolt. He commissioned a series of woodcuts, but the relative positions of the stars bear little resemblance to the descriptions given by Hyginus in the text or the actual positions of the stars in the sky.
