Rhea, Enceladus, and Dione are three of Saturn’s moons.  This is what they looked like as seen from the Cassini spacecraft one day in 2011. The night side of Saturn is on the left. Rhea is closest to Cassini. It is the largest moon in center of the image. Enceladus is to the right of Rhea. Dione is partially covered by Saturn.

Image Credit:  NASA