Callisto, Jupiter's second-largest moon, may have a rocky surface with an ocean beneath the surface. Corey J. Cochrane, NASA/JPL-Caltech.

Callisto is the outermost of the Galilean moons. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Callisto is Jupiter's second-largest moon ...

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, ...

Callisto, Jupiter's moon, is likely an ocean world, with evidence suggesting a subsurface ocean beneath its ice shell. Reanalysis of Galileo spacecraft data, ...

Jupiter's four largest moons are some of the solar system's most compelling worlds. Io is dotted with active volcanoes , and Europa hides a subsurface ocean many want to check for alien life .

The new evidence regarding Callisto comes from a somewhat surprising place: old data. NASA's Galileo mission, which launched into space in 1989, was designed to study Jupiter, its moons, and its ...

Jupiter moons Callisto and Ganymede are among the biggest in the solar system, and potential grounds for liquid water and alien life. NASA's JUICE mission will probe them for signs of both.

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.

Jupiter’s moon Callisto passes near the planet’s northern limb, ... Callisto just grazes Jupiter’s northern limb from about 9 P.M. to 9:30 P.M. CDT as it passes from west to east.

Meet Io, Europa, Ganymede and Callisto. Jupiter has dozens of moons. Four of them in particular are of interest to planetary scientists. Io, Europa, Ganymede and Callisto are, ...

Callisto, Jupiter's second-largest moon, may have a rocky surface with an ocean beneath the surface. Corey J. Cochrane, NASA/JPL-Caltech ...