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Cosmic Queries – Space Volcanoes: Fire and Ice with Natalie Starkey
StarTalk Radio
Are There Volcadoes on the Surface?
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Io i is hot. It's very much like earth was kind of four billion years ago. So it erupts these plumes of rock almost continuously off its surface. But then all the other moons there are kind of icy moons, so they've got these rocky interiors. They're either ocean worlds with an ice cap on the outside, or they're just made of ice e. And these are the really interesting ones, because in order to have sotof an ocean underneath the ice, we know that they must still be warm inside. Somehow it must be warm enough to heat the ice, to turn it into a liquid. This instantly tells us that these worlds are active and
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