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

The Io–Jupiter system is similar, in scale, to an exoplanet orbiting an M-dwarf, and if volcanic Io doesn't have a magma ocean then perhaps exoplanets on close orbits around M-dwarfs don't either.

What can a sample return mission from Jupiter's volcanic moon, Io, teach scientists about planetary and satellite (moon) formation and evolution? This is what a recent study presented at the 56th ...

Jupiter moon of Io is famed for its volcanoes. NASA just spotted the most powerful one yet Not only was the hot spot larger than Earth’s Lake Superior, but it also was seen belching out ...

Jupiter's moon Io is the solar system's most volcanic body thanks to a gravitational tug of war that rages below its surface. But now scientists know the violent moon has always been this way.

Io fast facts. Age: Io is about 4.5 billion years old, about the same age as Jupiter. Distance from Jupiter: Io is the fifth moon from Jupiter. Its average orbital distance is about 262,000 miles ...

NASA's robotic Juno spacecraft is delivering the fresh data on Io with a series of flybys, each getting closer to Jupiter's volcanic moon until a pair of close-up encounters at a range of less ...

S cott Bolton’s first encounter with Io took place in the summer of 1980, right after he graduated from college and started a job at NASA. The Voyager 1 spacecraft had flown past this moon of Jupiter, ...

There are new, high-quality images of Jupiter's moon, Io, thanks to the nearest flyby of the celestial body by a spacecraft in decades.. NASA released images Saturday taken by the Juno spacecraft ...

In our favorite space image of the week, NASA's Juno spacecraft got an unprecedented look at Jupiter's volcanic moon Io from just 930 miles away.

Jupiter’s moon Io has possibly been erupting for a very, very, very long time. Io is the most volcanically active body in our solar system, with some of its volcanoes shooting magma higher than ...

On March 9, 1979, Linda Morabito discovered a volcanic plume on Io, a moon of Jupiter, in one of the photos from Voyager 1. She wrote, “I could feel tears begin to roll down my face at the sight ...