Iddo Genuth writes: "Researchers working on NASA's Cassini mission to Saturn are
theorizing that Saturn's moon Enceladus has pockets of liquid water located just underneath its surface. Several recent flybys of this moon (including one on October 9, 2008 that passed a mere 16 miles from its surface) focused on studying water vapor plumes and jets of icy particles shooting out of the moon. This phenomenon was discovered by Cassini in 2005, but the new closer photographs and spectral analysis of captured particles allowed researchers to compare their behavior to mathematical models. The observed behavior matches that which was predicted for situations when underground water is present."
A method of solution is perfect if we can forsee from the start,
and even prove, that following that method we shall attain our aim.