On January 7, 1610, the Italian astronomer Galileo discovered three of Jupiter's moons: Callisto, Europa and Io. When he ...

As the innermost of Jupiter’s Galilean moons, Io offers a glimpse into some of the most extreme geologic phenomena in the ...

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 ...

No moon in our solar system is likely as chaotic as Io, Jupiter’s third largest. The rocky body looks like a pepperoni pizza because of the constant, numerous eruptions on its surface.

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

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. Sponsor Message "We think that the Moon went ...

Since the late 1970s, scientists have believed that Io could have an ocean of lava hidden beneath its surface, causing much of the Jovian moon’s surface-level volcanic activity. However ...

Only Jupiter's moon Io, by far the most volcanically active body in the solar system, offers comparable conditions. These new considerations published today in the journal Nature by an ...

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 ...