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Icy moon of Uranus may have once hid watery secret, Voyager 2 archives reveal

Live Science
Summary
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77% Informative

New research suggests Miranda , a small Uranian moon, may have once possessed a deep liquid water ocean beneath its surface.

The ocean may have measured 62 miles ( 100 kilometers ) deep, buried beneath 19 miles ( 30 kilometers ) of surface ice.

Miranda has a radius of just 146 miles ( 235 kilometers ), which means the ocean would have taken up almost half the moon's entire body.

Miranda eventually fell out of sync with one of the other Uranian moons, nullifying the mechanism keeping Miranda warm.