In Greek mythology, Aether, Æther, Aither, or Ether (; (Brightness) ) is the personification of the bright upper sky. According to Hesiod, he was the son of Erebus (Darkness) and Nyx (Night), and the brother of Hemera (Day). In Orphic cosmogony Aether was the offspring of Chronus (Time), and the brother of Chaos and Erebus. Genealogy According to Hesiod's Theogony, which contained the "standard" Greek genealogy of the gods, Aether was the offspring of Erebus and Nyx, and the brother of Hemera. However, other early sources give other genealogies. According to one, the union of Erebus and Nyx resulted in Aether, Eros, and Metis (rather than Aether and Hemera), while according to another, Aether and Nyx were the parents of Eros (in Hesiod, the fourth god to come into existence after Chaos, Gaia (Earth), and Tartarus). Others tell us that Uranus (Sky) (in Hesiod, the son of Gaia) was Aether's son, and that "everything came from" Aether. In Orphic cosmogony Aether was the offspring of Chronus (Time), the first primordial deity, and the brother of Chaos and Erebus. And made from (or placed in) Aether was the cosmic egg, from which hatched Phanes/Protogonus, so Aether was sometimes said to be his father. The Orphic Argonautica gives a theogony that begins with Chaos and Chronus, and has Chronus producing Aether and Eros. Aether also played a role in Roman genealogies of the gods. Cicero says that Aether and Dies (Day) were the parents of Caelus (Sky), and reports that according to the "so called theologians" Aether was the father of one of the "three Jupiters". According to Hyginus's (possibly confused) genealogy, Nox (Night), Dies, Erebus, and Aether were the offspring of Chaos and Caligo (Mist), and Aether and Dies were the parents of Terra (Earth), Caelus (Sky) and Mare (Sea), and Aether and Terra were the parents of: Sources Early For the ancient Greeks, the word aether (unpersonified), referred to the upper atmosphere, a material element of the cosmos. For example Homer has Sleep climb: However, Aether (personified) figured prominently in early Greek cosmogony. In Hesiod's Theogony, Chaos was the first being after which came Gaia (Earth), Tartarus, and Eros, then from Chaos came Erebus (Darkness) and Nyx (Night), and from Erebus and Nyx came Aether and Hemera (Day): Aether perhaps also figured in the lost epic poem the Titanomachy (late seventh century BC?). Two ancient sources report statements about Aether,