Cassini spacecraft image of Saturn's moon Atlas. This is the side of the moon that faces away from Saturn. Saturns outer A ring is across the bottom of the image. The joint NASA-ESA Cassini-Huygens spacecraft was launched in 1997 and took seven years to reach Saturn and its moons. The Huygens probe separated from Cassini on 25th December 2004, and descended to the surface of Saturn's largest moon, Titan. The Cassini orbiter continued orbiting Saturn; studying its atmosphere and rings and performing flybys of its moons. Image obtained by Cassini's narrow-angle camera on 6th December 2015 at an approximate distance of 32,000 kilometres from Atlas.