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

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 ...

Io is the most volcanic body known to science, and researchers have puzzled over its history for years. A new report suggests it was born this way. This image revealing the north polar region of ...

“We can see that this body is completely covered with volcanoes over both poles and all across its middle, (which are) constantly going off.” The new data suggests that Io’s numerous ...

There are hundreds of active volcanoes on Io. The new one is located just south of Io’s equator and the Juno images show fresh lava flows and volcanic deposits covering an area of 32,400 square ...

Io's surface is peppered with hundreds of volcanoes, some spewing sulfurous plumes hundreds of miles high. The volcanic moon is Jupiter's third-largest and the innermost Galilean satellite ...

A new volcano has been spotted on Jupiter's moon Io, the most geologically active place in the solar system. Analysis of the first close-up images of Io in over 25 years, captured by the JunoCam ...

Jupiter's satellite Io is one of its largest moons. Credit: NASA / JPL-Caltech NASA's Juno spacecraft has made several close swoops by Jupiter's volcanic moon Io, and it's beamed back stunning ...

Behold the volcano-blanketed moon, Io. After swooping by Jupiter's tortured moon on Feb. 3, NASA's Juno spacecraft beamed back some of the closest-ever images of this unique world. The agency's ...

"The twin flybys are designed to provide new insight into how Io’s volcanic engine works and whether a global magma ocean exists under Io’s rocky surface," NASA posted on X-formerly Twitter.