Two icy moons of Jupiter, though neighboring and of similar size, exhibit radically different internal structures. A new study suggests this dichotomy stems from their very formation, ...

Since Callisto also has an intense ionosphere, the team decided to test their methods on 30-year-old measurements taken by NASA's Galileo mission. That mission launched in 1989 and scanned Jupiter ...

Astrum. Jupiter’s Hidden Moon: What You’ve Missed About Callisto. Posted: May 19, 2025 | Last updated: May 19, 2025. Often overshadowed by Europa and Ganymede, Callisto is actually one of the ...

It isn't clear what's happening at Callisto to produce so much oxygen, but Carberry Mogan hopes to get a better understanding of processes active in the moon's surface that may yield an ...

Callisto is also thought to have liquid water, too. The small, rocky body is constantly being stretched and compressed by Jupiter’s huge gravitational force , keeping the moon ‘malleable ...

Astronomers have spotted gaseous carbon dioxide across the atmosphere of Jupiter’s second-largest moon, Callisto, hinting that it might have a much more complex carbon cycle than we thought.