Draco, the dragon:

An ancient constellation which represents nearly every dragon mentioned in history. The most famous story involving Draco tells that he was the dragon that Hercules had to defeat in order to possess the Golden Apples of Hesperides. Draco is also regarded as the dragon who guarded the Golden Fleece, and the dragon that the goddess Athena defeated when the Olympian gods fought the Titans. Athena grabbed the dragon's tail and threw it into the sky, where it became twisted around the the northern pole of the sky. Draco is a long constellation, but contains few bright stars. It is located between Ursa Major and Ursa Minor (Big and Little Dippers). Its location makes it circumpolar, so it never sets below the northern horizon.