Gravity measurements by NASA's Cassini spacecraft and Deep Space Network
suggest that Saturn's moon Enceladus, which has jets of water vapor and
ice gushing from its south pole, also harbors a large interior ocean
beneath an ice shell, as this illustration depicts.
For full details... click... http://www.nasa.gov/press/2014/april/nasa-space-assets-detect-ocean-inside-saturn-moon/index.html#.Uz9aAaLzaXV