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

"Io stands out as the most volcanically active body in our solar system, boasting hundreds of active volcanoes that emit plumes of gas and dust reaching heights of up to 400 km [250 miles] and ...

Thanks to the Juno probe mission, a mystery about Jupiter's moon Io that lasted over 40 years has been solved. It is now known why Io is the most volcanically active body in the Solar System.

In March and April 2025, internet users shared a striking image that they claimed showed "Steeple Mountain," a massive point of interest on Jupiter's moon Io. NASA Jet Propulsion Laboratory ...

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 ...