Let’s take a look at the recent announcement of the “astonishing” discovery of a global subsurface ocean on Saturn’s “Death Star” icy moon Mimas.
The discovery is based on new modeling/simulation of Mimas’s "wobble" (libration) around its axis, its orbital shift over 13 years and Mimas’s tidal heating. It rules out the alternate hypothesis of an oval shaped rocky core. There is no direct evidence of liquid water.
