Aither may refer to: *

Aether (classical element) According to ancient and History of science in the Middle Ages, medieval science, aether (, alternative spellings include ''æther'', ''aither'', and ''ether''), also known as the fifth element or quintessence, is the material that fills the regio ...

, the material supposed to fill the region of the universe above the terrestrial sphere *

Aether (mythology) 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 cosmo ...

, the personification of the "upper sky", space and heaven, in Greek mythology

See also