 Aether (classical element)

Aether, also spelled "ether," is one of the classical elements in ancient philosophy and science, traditionally representing the fifth element in addition to earth, water, fire, and air. In ancient Greek thought, aether was considered the divine substance that made up the heavenly spheres and bodies, filling the region of the universe beyond the terrestrial sphere. It was thought to be a pure, luminous substance that was associated with the heavens and the cosmos.