Rhea

Rhea was a Greek Titan, daughter of Uranus and Gaia and known as the mother of the gods. Discovered in 1672, Dione was one of four moons discovered by Cassini (along with Dione, Iapetus & Tethys).

Made of more than two thirds ice and though the rest would be rock Rhea does not have a definite core. The interior is a somewhat homogeneous mixture of rock and ice with the ice nearer the core compressed.

It also appears that Rhea has 3 small rings and is the first moon we've discovered with such a feature.

Rhea's surface is covered with craters and other features with varying reflectiveness. It's very much like a larger and less dense Dione. The moon is also tide locked with the same side facing Saturn. As a result the trailing side is different from the leading side.