The Solar System may be an even soggier place than we suspected.
in the category of 'IWOWs' . But if so, it's an IWOW of a kind we've never seen before, expanding our understanding of what's possible.says geophysicist Alyssa Rhoden"IWOWs, such as Enceladus and Europa, tend to be fractured and show other signs of geologic activity. Turns out, Mimas' surface was tricking us, and our new understanding has greatly expanded the definition of a potentially habitable world in our Solar System and beyond.
At the bottom of the ocean is one of them, clustered around hydrothermal vents that release heat and nutrients from Earth's interior. Here, life relies not on photosynthesis, but on chemosynthesis, harnessing chemical reactions to synthesize food.'s moon Europa and Saturn's moon Enceladus were found to harbor liquid oceans beneath their icy crusts.
Mimas, however, did not appear to belong to this group of moons. It's closer to Saturn and has a more eccentric orbit than Enceladus, which means it ought to experience stronger tides; yet its activity is much lower than that of Enceladus. But the vexing problem of its libration, or physical 'wobble', as detected by Saturn probe Cassini, remained. If Mimas was solid, it shouldn't wobble in the same way.that either it had a differentiated core or a liquid ocean – something preventing the core from being rigidly connected to the surface, allowing the latter to shift around.Rhoden and her team wanted to investigate the possibility of a liquid ocean.
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