Io: Jupiter's Most Volcanic Moon
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Io Probably Doesn’t Have a Global Magma Ocean After All - Eos

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Juno captured images of Io ’s poles for the first time during two recent flybys, one in December 2023 and one in February 2024 .
Images showed that volcanoes are strewn across the poles , and scientists believed this distribution to be evidence that a global magma ocean lay hidden beneath Io 's crust.
Juno data also allowed the Juno science team to more accurately measure now much Io is being stretched by Jupiter ’s gravity.