Nemesis mother goddess, Cybele. Nemesis has been described as the daughter of Oceanus or Zeus, but according to Hyginus she was a child of Erebus and Nyx. She has also been described, by Hesiod, as the daughter of Nyx alone. In the Theogony, Nemesis is the sister of the Moirai (the Fates), the Keres (Black Fates), the Oneiroi (Dreams), Eris (Discord) and Apate (Deception) In some metaphysical mythology, Nemesis produced the egg from which hatched two sets of twins: Helen of Troy and Clytemnestra, and the Dioscuri, Castor and Pollux. While many myths indicate Zeus and Leda to be the parents
Castor et Pollux to remain alive with her for a single day. Telaira bitterly accuses him of never having loved her. Jupiter descends in a storm as a deus ex machina to resolve the dilemma. He declares that Castor and Pollux can both share immortality. The opera ends with the "fête de l'univers" ("Festival of the Universe") in which the stars, planets and sun celebrate the god's decision and the twin brothers are received into the Zodiac as the constellation of Gemini. The prologue was completely cut; it was no longer politically relevant and the fashion for operas having prologues had died out.