Aether naturally moved in circles, and had no contrary, or unnatural, motion. It is also personified as a deity, Aether, the son of Erebus and Nyx in traditional Greek mythology. Their Aether is related to αἴθω "to incinerate", and intransitive "to burn, to shine" (related is the name Aithiopes (Ethiopians; see Aethiopia), meaning "people with a burnt (black) visage"). Aether, sometimes also spelled Aither, was a primordial god of light. The use of aether to describe this motion was popular during the 17th and 18th centuries, including a theory proposed by Aether has been used in various gravitational theories as a medium to help explain gravitation and what causes it. The word αἰθήρ (aithḗr) in Homeric Greek means "pure, fresh air" or "clear sky". Aristotle also noted that This elemental system spread rapidly throughout all of Europe and became popular with alchemists, especially in medicinal alchemy.
In Greek mythology, Aether is one of the primordial deities. Like Tartarus and Erebus, Aether may have had shrines in ancient Greece, but he had no temples and is unlikely to have had a cult. "Ancient Greek deity, personification of the upper air Aether was considered as a god of the upper air as well. Medicinal alchemy then sought to isolate quintessence and incorporate it within medicine and elixirs.Despite the early modern aether models being superseded by general relativity, occasionally some physicists have attempted to reintroduce the concept of aether in an attempt to address perceived deficiencies in current physical models.The motion of light was a long-standing investigation in physics for hundreds of years before the 20th century.
Robert Fludd, "Mosaical Philosophy". In Greek mythology, it was thought to be the pure essence that the gods breathed, filling the space where they lived, analogous to the air breathed by mortals. Aether was one of the primordial deities in Greek mythology, the son of the primordial deities Erebus (darkness) and Nyx (night), or according to Orphic Hymns, Chronos (time) and Ananke (necessity). In the beginning, there was just Chaos. London, Humphrey Moseley, 1659. From the void emerged Erebus, the god of darkness, and Nyx, the goddess of the night. Later in this text you will see what it actually means and what are the most important generations of ancient Greek gods. He was the god of the light and he was in the group of the so called primordial deities.
Hyginus says further that the children of Aether and Day were Earth, Heaven, and Sea, while the children of Aether and Earth were "Grief, Deceit, Wrath, Lamentation, Falsehood, Oath, Vengeance, Intemperance, Altercation, Forgetfulness, Sloth, Fear, Pride, Incest, Combat, Ocean, The fifth Orphic hymn to Aether describes the substance as "the high-reigning, ever indestructible power of Zeus," "the best element," and "the life-spark of all creatures. Aether is the personification of the "upper sky". One of the most important gods in the whole Greek mythology was the god Aether.
Aether’s mists were able to fill the space between the transparent mists on the … Pg 221.Einstein, Albert: "Ether and the Theory of Relativity" (1920), republished in Sidelights on Relativity (Methuen, London, 1922) Aether was only capable of local motion. Aether differed from the four terrestrial elements; it was incapable of motion of quality or motion of quantity. He embodies the pure upper air that the gods breathe, as opposed to the normal air (ἀήρ, aer) breathed by mortals. He was also the god of the sky, which the ancient Greeks considered to be “blue ether” that represented heaven. He was the brother of Hemera (day), and according to some sources, he fathered Gaea (earth), Thalassa (sea) and Uranus (heavens).