Observers in the eastern half of the U.S. can catch the large blot of Ganymede’s shadow sliding across the cloud tops of Jupiter as darkness falls this evening. The shadow is already transiting at ...

NASA has recorded the most powerful volcanic eruption outside of Earth on Io, one of Jupiter’s moons. On December 27, 2022, Juno, NASA’s spacecraft, witnessed numerous active volcanoes erupting ...

New images of Jupiter moon Io show massive volcanoes, a scarred landscape and lava flows. Jupiter has a total of 92 moons, and Io is slightly larger than Earth’s moon. A key nuclear weapons treaty is ...

This is a montage of New Horizons images of Jupiter and its volcanic moon Io, taken during the spacecraft’s Jupiter flyby in early 2007. The Jupiter image is an infrared color composite taken by the ...

Jupiter’s volcanic moon Io blazes with hundreds of hot spots, mountains higher than Everest, and pulsing lava lakes. Trump’s message to Bondi sparks DOJ firestorm Cheap Trick defends performing at ...

"It's like estimating the brightness of a bonfire by observing only the flames and not the surrounding embers." When you purchase through links on our site, we may earn an affiliate commission. Here’s ...

Trapped in a gravitational push and pull between Jupiter and other Jovian moons, Io is constantly being stretched and compressed. Heat generated by these contortions has melted pockets of the moon's ...

On October 10, 2025, a double transit event of Jupiter's moons, Io and Europa, along with their shadows, is observable across the planet's disk. This predawn phenomenon begins at 4:30 A.M. EDT with ...

The original version of this story appeared in Quanta Magazine. Scott 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 ...

Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. One of Jupiter’s most recognizable attributes is its sheer size ...

New data from the orbiter has unveiled some of the treacherous conditions of not only Jupiter, but its moon Io, the most volcanic body in the solar system. The findings, which come after Juno has ...