NASA's Juno spacecraft has again captured stunning images of Jupiter and its moon Io, providing more insights into the solar ...

While Galileo Galilei first observed Io in 1610, its volcanic nature wasn’t discovered until nearly four centuries later. In 1979, NASA’s Voyager 1 spacecraft captured images of volcanic ...

Io is the most volcanically active world in our solar system. Now, NASA scientists have revealed how and why. When you purchase through links on our site, we may earn an affiliate commission.

An illustration of NASA's Juno craft soaring above Jupiter's atmosphere. Jupiter's satellite Io is one of its largest moons. Credit: NASA / JPL-Caltech NASA's Juno spacecraft has made several close ...

Io's north polar region as captured by Juno. (Credit: NASA/JPL-Caltech/SwRI/Gerald Eichstädt) Since 1979, when Voyager 1 first spotted volcanoes on Io, astronomers ...

Spacecraft from NASA and other organizations captured rich imagery of our solar system in 2024, including views of Mars, Io, ...

Earlier, after Io's volcanic activity was discovered in 1979, scientists thought that the moon has a global magma ocean. But Juno, from its close flybys in December 2023 and February 2024 has helped ...

NASA's Juno mission revealed that Jupiter's moon, Io, the most volcanic body in our solar system, doesn't possess a global magma ocean. Instead, separate magma chambers fuel its over 400 active ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. The Juno mission ...