"For the very first time, we have a global view of Io's ongoing volcanic activity." The most volcanically active world in the solar system, Jupiter's moon Io, may possess a global ocean of magma ...

The hellish surface of a moon of Jupiter known as Io is riddled with hundreds of lava-spewing volcanoes that make the world ...

We knew data from Juno’s two very close flybys could give us some insights on how this tortured moon actually worked.” Io orbits around Jupiter, the largest planet in our solar system ...

A NASA spacecraft made its closest-ever approach to Jupiter's moon Io, coming within 930 miles of the "surface of the most volcanic world," and the space agency released new images of the flyby.

Io, along with the other three Galilean moons, was first seen by Galileo in 1610, making them the first moons ever discovered (aside from Earth's moon...which really wasn't that hard to "discover").

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 ...

Scientists can say two things with certainty about Io. First, this moon of Jupiter is the most volcanic object in the known universe. Its surface is festooned with so many lava-spewing calderas ...

Recently, the spacecraft has been making close flybys of the Jovian moon Io, which is the most volcanically active body in the solar system. And it has observed some dramatic features there ...