He distinguished between a gravitational and a luminiferous aether. The idea of the luminiferous aether was then abandoned. It is generally considered to be the evidence against the theory of a luminiferous aether. Aristotle also noted that crystalline spheres made of aether held the celestial bodies. The celestial spheres were made of a fifth element, an unchangeable aether. Larmor held that matter consisted of particles moving in the aether. Lorentz on his side continued to use the aether hypothesis. Sagnac believed that his results constituted proof of the existence of a stationary aether. Jean-Augustin Fresnel modeled hypothetical behavior of the aether. Sagnac himself believed that he had proved the existence of the aether. Using Hydaelyn's blessing of light, the adventurer strips the Ultima Weapon of its primal aether. According to Hyginus, Tartarus was the offspring of Aether and Gaia. That is, many problems are solved more easily by imagining the existence of an aether. Aergia is the daughter of Aether and Gaia. They were composed of an incorruptible substance called aether.