Leaking Moon

Powerful jets of water and ice shoot into space from the south pole of Enceladus, a moon of Saturn, in this 2009 composite image from the Cassini spacecraft. (The image has been rotated so that south is "up.") The water squirts through narrow cracks, called tiger stripes. It may come from a large ocean of mineral-rich liquid water below the moon's surface. Cassini has made several passes by Enceladus, and will swing just 50 miles above its surface on March 27. [NASA/JPL/SSI]