Enceladus vents water into space from its south polar region. The moon is lit by the Sun on the left, and backlit by the vast reflecting surface of its parent planet to the right. Icy crystals from these plumes are likely the source of Saturn's nebulous E ring, within which Enceladus orbits. Mosaic composite photograph. Cassini, December 25, 2009. CREDIT: NASA/JPL-Caltech/Michael Benson/Kinetikon Pictures. © All rights reserved.