Aether (also Æther, Greek: ᾿ΑιθήÏ), in Greek mythology, is one of the Protogenos (first-born). He is the personification of the "upper sky", space and heaven, and the elemental god of the "Bright, Glowing, Upper Air." He is the pure upper air that the gods breathe, as opposed to regular air (᾿ΑήÏ, aer), the gloomy lower air of the Earth, which mortals breathe.