Here Cassini's cameras zoom in on two moons of Saturn: Rhea and Titan.
In the foreground, craters are visible on the icy surface of Rhea. The moon is about 25 percent rock and 75 percent water ice. Giovanni Domenico Cassini, the spacecraft's namesake, was the first to discover this moon in 1672, which he named for the mother of the gods in Greek mythology.
Titan's hazy atmosphere appears as a smooth backdrop for its mini moon sister. Despite their close appearance, Cassini was still 808,000 miles from Rhea and 1.2 million miles from Titan when the image was taken on December 10, 2011.
A total of 62 moons have been found orbiting the planet, 53 of which are named.