Explore Io, the most volcanically active body in the solar system. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Io — Jupiter's fifth moon — is ...
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Roughly 40 years ago, the Voyager 1 spacecraft sailed past one of Jupiter’s large moons, and it revealed something amazing: The rocky moon, called Io, is a volcanic champion, featuring the first ...
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