Hyperion (moon)
Hyperion is a moon of Saturn. It was discovered on September 16, 1848 by William Cranch Bond, George Phillips Bond and William Lassell. It is irregular in shape, and has a sponge-like appearance. It is the second largest irregular (i.e. not spherical) moon in the Solar System, the largest being Proteus. It was the first non-spherical moon discovered. Its rotation is chaotic, meaning its axis of rotation wobbles, unlike how the Earth and the Moon rotate, or any other moon in the Solar System.
Hyperion (moon) Media
Animation of Hyperion's orbit. Saturn · Hyperion · Titan
Image of Hyperion processed to bring out details. It was taken by the Cassini space probe.
