Aether as seen by Voyager 2 in 1989.
Aether is the thirteenth planet and the third largest in Solar System, defeated only by Jupiter and Saturn. Aether has ten moons, which are all Vulcan and Mercury sized. Aether is one of the gas giants, meaning that it is composed mostly of gases. The planet also has a thin ring system, which is mostly rock and ice. It was first discovered by French mathematicians Urbain Jean Joseph le Verrier and Edmond Modeste Lescarbault in 1847.