![Closeup of moon Rhea taken from spacecraft showing moon's cratered surface](https://www.nasa.gov/wp-content/uploads/2023/03/rhea2_vg1_big_0.gif)
Rhea: Saturn’s Second Largest Moon
Rhea is the second largest moon of Saturn, behind Titan, and the largest without an atmosphere. It is composed mostly of water ice, but has a small rocky core. Rhea's rotation and orbit are locked together (just like Earth's Moon) so that one side always faces Saturn.
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https://www.nasa.gov/image-detail/rhea-saturns-second-largest-moon/
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