<P> Libra was known in Babylonian astronomy as MUL Zibanu (the "scales" or "balance"), or alternatively as the Claws of the Scorpion . The scales were held sacred to the sun god Shamash, who was also the patron of truth and justice . It was also seen as the Scorpion's Claws in ancient Greece . Since these times, Libra has been associated with law, fairness and civility . In Arabic zubānā means "scorpion's claws", and likely similarly in other Semitic languages: this resemblance of words may be why the Scorpion's claws became the Scales . It has also been suggested that the scales are an allusion to the fact that when the sun entered this part of the ecliptic at the autumnal equinox, the days and nights are equal . Libra's status as the location of the equinox earned the equinox the name "First Point of Libra", though this location ceased to coincide with the constellation in 730 because of the precession of the equinoxes . </P> <P> In ancient Egypt the three brightest stars of Libra (α, β, and σ Librae) formed a constellation that was viewed as a boat . Libra is a constellation not mentioned by Eudoxus or Aratus . Libra is mentioned by Manetho (3rd century B.C.) and Geminus (1st century B.C.), and included by Ptolemy in his 48 asterisms . Ptolemy catalogued 17 stars, Tycho Brahe 10, and Johannes Hevelius 20 . It only became a constellation in ancient Rome, when it began to represent the scales held by Astraea, the goddess of justice, associated with Virgo in the Greek mythology . </P> <P> Libra is bordered by the head of Serpens to the north, Virgo to the northwest, Hydra to the southwest, the corner of Centaurus to the southwest, Lupus to the south, Scorpius to the east and Ophiuchus to the northeast . Covering 538.1 square degrees and 1.304% of the night sky, it ranks 29th of the 88 constellations in size . The three - letter abbreviation for the constellation, as adopted by the International Astronomical Union in 1922, is' Lib' . The official constellation boundaries, as set by Eugène Delporte in 1930, are defined by a polygon of 12 segments (illustrated in infobox). In the equatorial coordinate system, the right ascension coordinates of these borders lie between 14 22 08.08 and 16 02 17.23, while the declination coordinates are between − 0.47 ° and − 30.00 ° . The whole constellation is visible to observers south of latitude 60 ° N . </P> <P> Overall, there are 83 stars within the constellation's borders brighter than or equal to apparent magnitude 6.5 . </P>

Where is the constellation libra located in the sky
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