Ether (Aether; Bright upper air) Greek Son of Nyx (Night) and Erebus (Darkness); brother of Hemera (Day). Ether was the personification of the upper air, the pure, bright, and good realm where the gods dwelled. He stretched between the dome of the sky, which was the realm of Uranus, and the air close to the Earth that humans breathed. Each night, his mother blocked the mortal view of Ether, and each day Hemera revealed his brilliant blue to the people below. Some Greek poets and writers claimed that Ether was the source of all life, the soul of the universe. Ether was said to be the father, with his sister Hemera, of the sea goddess Thalassa, and of many natural forces, such as anger, lies, sorrow, and pride.