In a landmark observation by a team of international researchers, NASA's Juno spacecraft has, for the first time, clearly ...

Callisto, Jupiter's second-largest moon, may have a rocky surface with an ocean beneath the surface. If there was a contest for the most interesting moon in our solar system, Callisto would be a ...

New evidence from an old NASA mission supports the theory that Jupiter's moon Callisto is in fact an ocean world. Credit: NASA / JPL / DLR A moon of Jupiter about the size of Mercury likely has a ...

NASA's Juno spacecraft has spied the final "auroral footprint" of a moon of Jupiter, meaning that it has watched as the moon ...

The crescent moon will shine with Jupiter among the stars of Gemini early on Sept. 16. Turn your eyes to the east in the ...

Io, Europa and Ganymede had already shown their footprints through earlier observations. But Callisto, the farthest Galilean ...

At last count, Jupiter had 92 moons, so it can be tough to get the spotlight. Especially when you are competing with the likes of Europa, showing off with hints of underground oceans, and possibly ...

NASA’s Juno spacecraft has successfully found and characterised the auroral “footprints” of Jupiter’s moon Callisto for the first time. This discovery completes ...

Gaze up at the night sky and picture a world bigger than Mercury but lost well out of sight. Jupiter's moon Callisto, cratered and icy, could conceal mysteries beneath its battered surface. Callisto's ...

The rocket took off on Friday morning from the Guiana Space Center in French Guiana on the coast of South America. It will take the spacecraft eight years to reach the solar system’s largest planet.