Published December 25, 2013 at 500 × 500 in Cassini Sees Saturn and Moons in Holiday Dress Saturn’s largest and second largest moons, Titan and Rhea, appear to be stacked on top of each other in this true-color scene from NASA’s Cassini spacecraft. Image Credit: NASA/JPL-Caltech/Space Science Institute (Visited 15 times, 1 visits today)