Category:Definitions/Aether

This category contains definitions related to Aether.

Quintessence

Quintessence was the fifth element postulated by the Pythagoreans, and was supposed to be the material out of which the heavens were made.

It was postulated in order to explain how the heavenly bodies were in constant motion, and never came to rest like everything else that could be seen in the universe.

Quintessence was originally known as aether.

Physical Concept

An aether was a hypothetical weightless fluid which was supposed to pervade the whole of the physical universe, including all matter.

Its purpose was to attempt to explain the phenomenon of action at a distance.