In Greek mythology, Nyx is the goddess and personification of the night. In Hesiod's Theogony, she is the offspring of Chaos, and the mother of Aether and Hemera (Day) by Erebus (Darkness). By herself, she produces a brood of children which are mainly personifications of primarily negative forces. She features in a number of early cosmogonies, which place her as one of the first deities to exist. In the works of poets and playwrights, she lives at the ends of the Earth, and is often described as a black-robed goddess who drives through the sky in a chariot pulled by horses. In the Iliad, Homer relates that even Zeus fears to displease her.