Selene was the Greek goddess of the Moon. According to the poet Hesiod, Selene was the daughter of the Titans Theia and Hyperion, making the goddess the sister of Helios (the Sun) and Eos (the Dawn). However, other ancient sources claim that she was the child of Pallas and Euryphaessa. Regardless of her ancestry, Selene, as the personification of the Moon, was an influential goddess. One of her best known myths involves the handsome Endymion. According to one version of the myth, she made certain that Endymion would remain eternally youthful by casting a spell that would cause him to sleep forever. In this way, Endymion would always live, sleeping through the ages.