You can now go to Week 8: Moons and the future
The announcement of a possible new inner moonlet forming at the edge of Saturn's main ring.
Revelation from Cassini observations that Mimas has an unanticipated large libration (a ‘wobble’). This could be explained either by an elongated core or an underground ocean (which would be surprising for such a small moon with an ancient heavily-cratered surface).
In June 2014 Professor David Rothery recorded a bonus video with Paul Byrne about what excites him about beginning a new project on icy moons.
Two independent lines of evidence pointing to hydrothermal (hot water) vents at the rock-water interface on the floor of Enceladus’s internal sea.