So who was Selene?
In his Theogeny Hesiod refers to Selene as the goddess of the moon. Her parents were the Titans Hyperion and Thea.
Hesiod, Theogeny lines 371-374
Theia yielded to Hyperion's love and gave birth to great Helios and bright Selene and Eos who brings light to all mortals of this earth and to the immortal gods who rule the wide sky
Taken from: Hesiod, Theogeny; works and days; shield; introduction, translation and notes by Apostolos N. Athanassakis, London: Johns Hopkins University Press, 1983
Apollodorus in his Biblioteca refers to the more commonly known story of Selene's love for Endymion.
Apollodorus, Biblioteca, Book I Chapter 7, paragraph 5
Calyce and Aethlius had a son Endymion who led Aeolians from Thessaly and founded Elis. But some say that he was a son of Zeus. As he was of surpassing beauty, the Moon fell in love with him, and Zeus allowed him to choose what he would, and he chose to sleep for ever, remaining deathless and ageless.
Taken from:
Apollodorus, The Library; with an English translation by Sir James George Frazer, (Loeb Classical Library; 121) London: Harvard University Press, 1921.
Homeric Hymns, 31. To Selene
O Muse Kalliope, begin to sing again of brilliant Helios whom cow-eyed Eryphaesa bore to the son of Ge and starry Ouranos. For Hyperion married his own sister, the glorious Eryphaesa, who bore him beautiful children: rosy-armed Eos, fair-tressed Selene and tireless Helios, so much like the immortals
Taken from:
Athanassakis, Apostolos N, The Homeric hymns Baltimore, Maryland: Johns Hopkins University Press, 1976
Virgil in his Georgics Book 3, lines 383-393 tells of Pan's seduction of Selene following a gift of some wool
If wool is your concern, then first of all banish the prickly growth of burrs and caltrops; avoid rich pastures; and from the very start select whole flocks with fleeces soft and white. as for the ram, though dazzling white he be, if but the tongue beneath the slimy palate is black, for fear the fleeces of your lambs bear dusky spots, reject him: look around, there's ample room for choice. by such a gift, Moon-goddess, of snow-white wool Pan, god of Arcady, lured and beguiled you, summoning you to the depths of a wood; and you did not disdain his summons
Taken from: Virgil, The Georgics; translated into English verse with introduction and notes by L.P. Wilkinson. Harmondsworth: Penguin, 1982
Diodorus Siculus, in his Biblioteca, Book 3, 57, lines 4-8 speaks of Selene's parents as Uranus' daughter Basileia and Hyperion
[Basileia] united in marriage with Hyperion, one of her brothers, for whom she had the greatest affection. And when there were born to her two children, Helius and Selene, who were greatly admired for both their beauty and their chastity, the brothers of Basileia, they say, being envious of her because of her happy issue of children and fearing that Hyperion would divert the royal power to himself, committed an utterly impious deed; for entering into a conspiracy amoung themselves they put Hyperion to the sword, and casting Helius, who was still in years a child, into the Eridanus river, drowned him. When this crime came to light, Selene, who loved her brother very greatly, threw herself down from the roof
Her mother fainted through grief and dreamed that Helius comforted her, saying,
That which had formerly been called the "holy fire" in the heavens would be called by men Helius ("the sun") and that addressed as "mene" would be called Selene ("the moon")
Taken from:
Diodorus of Sicily, The Library of history; with
an English translation by C.H. Oldfather, vol. II (Loeb
Classical Library), London: Heinemann, 1935