On the Zodiac, Libra lies between Virgo to the west and the Scorpio to the east.
Libra is the Zodiac sign for anyone born between September 22 and October 22. It is linked into astrology, a system of predicting one's personality traits and future based on the stars.
In some cosmologies, Gemini is associated with the classical element Air, and thus called a Air Sign (with Libra and Aquarius). Its polar opposite is Aries.
According to Greek Mythology, the constellation depicts Astraea's scales of Justice. Astraea (the Virgo) was known as the goddess of justice, hence the scales of justice Libra nearby.