Libra is Latin for weighing scales, making it the only star sign of the Zodiac that does not represent a living thing. At 538 square degrees, Libra is 29th biggest star sign (constellation). In England (the northern hemisphere) you can see Libra from April to July and in the southern hemisphere (Australia) it can be seen in Autumn and Winter.
Libra is one of the few constellations that is not a part of Greek mythology. The Babylonians thought the scales were for balance between the seasons as well as day and night.