Enceladus and the Search for Water . ... Credit Copyright: Cassini Imaging Team , SSI , JPL , ESA , NASA Explanation: Based on data from Cassini spacecraft instruments, researchers are now arguing that liquid water reservoirs exist only tens of meters below the surface of Saturn's small (500 kilometer diameter) but active moon Enceladus . The exciting new results center around towering jets and plumes of material erupting from the moon's surface. ... U. Based on Astronomy Picture Of the Day ...