Saturn's largest moon, Titan, is shown along with Saturn's third-largest moon, Dione, in this photo taken by NASA's Cassini spacecraft. Saturn's rings appear in the background. The side of Titan is the anti-Saturn side which is the side NOT seen from Saturn.
Titan is 3200 miles across and Dione is just under 700 miles across.
The photo was taken May 21, 2011 at a distance of about 1.4 million miles from Titan and 2 million miles from Dione.