NASA’s Juno spacecraft has delivered a stunning revelation about Io, the most volcanically active body in the solar system. Once believed to harbor a global magma ocean beneath its surface, Io’s fiery ...

Jupiter's volcanic moon Io doesn't appear to have a subsurface ocean of magma, resolving some issues about how Io's volcanoes erupt and raising broader questions about similar magma oceans within ...

The discovery solves a 44-year-old mystery of why, and how, Jupiter's violent moon, Io, became so volcanically active. Io is only slightly larger than our moon, with a diameter of 2,237 miles ...

This process is called "tidal heating." It is how Jupiter currently heats up its moon Io, the most volcanically active spot in the solar system. "We think that the Moon went through a period when ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The Juno mission ...

The Moon is far older than we once believed — but its fiery past has kept its true age hidden. New research reveals that, a ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: (left) NASA/JPL-Caltech/SwRI/MSSS Image processing by Emma Wälimäki; (inset) NASA ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Jupiter's volcanic moon Io doesn't appear to have a subsurface ocean of magma, resolving some ...