This image of Enceladus from January 31, 2011 shows an eruption of one of the moon's cryovolcanoes. These icy jets spew water and ice, which are either drawn into Saturn's rings or fall back as precipitation on the moon, Saturn's sixth-largest. Enceladus's surface water makes it one of the most promising places for finding extraterrestrial life.

For more background on these stunning photos, read the feature in our March 2013 issue.