The news here, if it be news, concerns Mimas the "Death Star moon", and its interactions with its enormous planet Saturn. Currently the best mathematic solution is that its ice contains an ocean, like Enceladus' ice.
That ocean would be 20–30 km deep. And it would have formed geologically recently, 5-15 Mya.
This admittedly comes from Cassini data. We have no more orbiters there, and I don't really want one there as yet, pending better (read: NERVA or fusion) engines and Starship to put them up there.
Still: that a frozen iceball can magically become a waterworld is intriguing. Is this because Saturn is doing tides on Mimas? Like - just now? I recall other indications that Saturn had more large moons than it now owns.
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