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

NASA's Juno spacecraft has detected the auroras of Jupiter's moon Callisto for the first time, completing observations of all four Galilean moons.

Jupiter hosts the brightest and most spectacular auroras in the solar system. Near its poles, these shimmering lights offer a ...

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 ...

However, prior to NASA's Juno mission, scientists had been unable to capture the auroral imprint of Callisto. The auroral phenomena of Jupiter are among the most striking natural wonders in the solar ...

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

Rare treat: Catch Callisto's shadow on Jupiter's cloud tops tonight If you have a 4-inch or larger telescope, tonight you'll have the opportunity to see a rare shadow transit of the Jupiter's ...

Jupiter's moons resemble little moons! Do they orbit in a regular pattern, similar to how the Moon orbits the Earth? Today, ...

One primary theory to explain its presence is that Jupiter's powerful magnetosphere may be knocking loose molecules of hydrogen, water and oxygen from the ice on Callisto's surface.

Callisto, despite being the second-largest of Jupiter's ridiculous number of moons and the third-largest moon in the Solar System, doesn't get a whole lot of attention.

Scientists using old flyby data from NASA's Galileo mission have found stronger evidence that Jupiter's moon Callisto has an ocean.