Mimas is every geeks favorite moon.
A moon of Saturn which was discovered in 1789 by William Herschel. It is named after Mimas, a son of Gaia in Greek mythology, and is also designated Saturn I.
With a diameter of 396 kilometers it is the twentieth-largest moon in the Solar System and is the smallest astronomical body that is known to be rounded in shape because of self-gravitation.
At left is Saturn's moon Mimas with a great view of the crater Herschel.
At right the unexpected and bizarre pattern of daytime temperatures found on Saturn's small inner moon.