In Greek mythology, Selene (Greek Σελήνη [selɛ̌ːnɛː] 'moon'; Doric Σελάνα; Aeolic Σελάννα) was an archaic lunar deity and the daughter of the Titans Hyperion and Theia. In Roman mythology, the moon goddess is called Luna, Latin for "moon".
The etymology of Selene is uncertain, but if the word is of Greek origin, it is likely connected to the word selas (σέλας), meaning "brightness" In post-Renaissance art, Selene is generally depicted as a beautiful woman with a pale face and long, lustrous, black hair; riding a silver chariot pulled by either a yoke of oxen, a pair of horses, or a pair of serpentine dragons. Often, she has been shown riding a horse or a bull, wearing robes with a moon on her head and carrying a torch.
In the traditional pre-Olympian divine genealogy, Helios, the sun, is Selene's brother: after Helios finishes his journey across the sky, Selene, freshly washed in the waters of Earth-circling Oceanus, begins her own journey as night falls upon the earth, which becomes lit from the radiance of her immortal head and golden crown. When she is increasing after mid-month, it is a "sure token and a sign to mortal men." Her sister, Eos, is goddess of the dawn. Eos also carried off a human lover, Cephalus, which mirrors a myth of Selene and Endymion.
As a result of Selene being conflated with Artemis, later writers sometimes referred to Selene as a daughter of Zeus, like Artemis, or of Pallas the Titan. In the Homeric Hymn to Hermes, with its characteristically insistent patrilineality, she is "bright Selene, daughter of the lord Pallas, Megamedes' son."
Selene's main symbol was the crescent. Animals that were associated with her were the Greek kyon (κύων, dog in Ancient Greek), the bull (& the cow), as well as the cock. These animals were Selene's followers during the night and the morning twilights.
The Roman moon goddess, Luna, had a temple on the Aventine Hill. It was built in the sixth century BC, but was destroyed in the Great Fire of Rome during Nero's reign. There was also a temple dedicated to Luna Noctiluca ("Luna that shines by night") on the Palatine Hill. There were festivals in honor of Luna on March 31, August 24 and August 29
Apollonius of Rhodes (4.57ff) refers to Selene, "daughter of Titan", who "madly" loved a mortal, the handsome hunter or shepherd—or, in the version Pausanias knew, a king— of Elis, named Endymion, from Asia Minor. In other Greek references to the myth, he was so handsome that Selene asked Zeus to grant him eternal sleep so that he would stay forever young and thus would never leave her: her asking permission of Zeus reveals itself as an Olympian transformation of an older myth: Cicero (Tusculanae Disputationes) recognized that the moon goddess had acted autonomously. Alternatively, Endymion made the decision to live forever in sleep. Every night, Selene slipped down behind Mount Latmus near Miletus to visit him.
Selene had fifty daughters, the Menae, by Endymion, including Naxos, the nymph of Naxos Island. The sanctuary of Endymion at Heracleia under Latmus on the southern slope of Latmus still exists as a horseshoe-shaped chamber with an entrance hall and pillared forecourt.
Though the story of Endymion is the best-known one today, the Homeric hymn to Selene (xxxii) tells that Selene also bore to Zeus a daughter, Pandia ("all bright"), goddess of the full moon. According to some sources, the Nemean Lion was her offspring as well. According to Virgil she also had a brief tryst with Pan, who seduced her by wrapping himself in a sheepskin and gave her the yoke of white oxen that drew the chariot in which she is represented in sculptured reliefs, with her windblown veil above her head like the arching canopy of sky. In the Homeric hymn, her chariot is drawn by long-maned horses.