'Another Saturn moon Dione may have subsurface ocean' 
A subsurface ocean may lie deep within Saturn's fourth largest moon Dione, according to new data from NASA's Cassini spacecraft's mission to Saturn. The data's geophysical analysis has suggested an estimated 100-km thick crust is covering a 65-km deep subsurface ocean in Dione. Two of Saturn's moons, Titan and Enceladus, are already known to harbour subsurface oceans under icy crusts.