A volcanic plume ejects gas and particles about 60 miles (100 kilometers) above the surface of Jupiter’s moon Io, the most volcanically active body in the solar system.

Even if a magma ocean is confirmed, “there are still a lot of uncertainties associated with trying to understand Io’s interior structure,” Tuttle Keane says.

Recent flybys of the fiery world refute a leading theory of its inner structure—and reveal how little is understood about geologically active moons.

Jupiter’s third-largest moon Io is the most volcanically active world in our solar system. New radio images by the ALMA telescope array show the direct effect of this volcanic activity on the ...

Like the offset eyes on a Picasso portrait, the volcanoes on Jupiter’s moon Io seem to be strangely shifted, according to a study by NASA and ESA scientists. Io’s clustered volcanoes seem to ...

Io's volcanic activity was discovered during the Voyager flyby of Jupiter, and further imaging has revealed a number of active volcanoes on the moon's surface—so many, that their total output is ...

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 ...

Our moon may have once been as hellish as Jupiter's super volcanic moon Io China's Chang'e 6 lunar samples suggest our moon is debris from an ancient Earth impact ...

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. The ...

During multiple flybys of Io in the 1990s, NASA's Galileo spacecraft measured the magnetic field of the moon. Based on these observations, scientists concluded that a churning magma ocean beneath ...