Saturn's moons, 2004.
© Jamie Cooper / Science & Society Picture Library
This image showing Saturn with five of its moons was taken on 20 December 2004 at 01:29 hrs UT using a webcam attached to a 10-inch Newtonian telescope. The moons are from left to right: Dione, Enceladus, Tethys, Rhea and Titan. Photograph by Jamie Cooper