Rhea, Enceladus, and Dione are three of Saturn’s moons.  This is what they looked like as seen from the Cassini spacecraft on 25 April, 2011. Saturn is also present in the picture on the left but is too dark to see. Rhea is closest to Cassini. It is the largest moon in center of the image. Enceladus is to the right of Rhea. Dione is to the left of Rhea and is partially covered by Saturn.

Image Credit:  NASA