Jupiter’s moons could be warming each other – Phys.org

Jupiter’s moons are hot.
Well, hotter than they should be, for being so far from the sun. In a process called tidal heating, gravitational tugs from Jupiter’s moons and the planet itself stretch and squish the moons enough to warm them. As a result, some of the icy moons contain interiors warm enough to host oceans of liquid water, and in the case of the rocky moon Io, tidal heating melts rock into magma.
Researchers previously believed that the gas giant Jupiter was responsible for most of th…

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