'If Mimas has an ocean, it represents a new class of small, 'stealth' ocean worlds with surfaces that do not betray the ocean's existence.'
, one of Saturn's other moons — tend to be fractured and show other signs of geologic activity. Mimas, however, lacks any telltale tectonic traits.
"Mimas seemed like an unlikely candidate, with its icy, heavily cratered surface marked by one giant impact crater that makes the small moon look much like the from 'Star Wars,'" Rhoden said in the statement."If Mimas has an ocean, it represents a new class of small, 'stealth' ocean worlds with surfaces that do not betray the ocean's existence.", scientists found that Mimas' ice shell had to be at least 34 miles thick at the time of the impact. Meanwhile, observations of Mimas and models of its internal heating suggest that its current ice shell is less than 19 miles thick, according to the statement.
These measurements suggest that an internal ocean has been warming and expanding since the basin formed. What's more, the researchers were only able to recreate the shape of the basin when factoring an interior ocean into their models.
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