NASA's Voyager probes passed through Jupiter's system and snapped pictures of its largest moons, also known as the Galilean ...

Callisto would be a contender. Jupiter's second-largest moon has more impact craters on its surface than any other planetary body in the solar system, and it has tons of ice on its surface as well.

The solar system is home to bizarre moons like Enceladus and Callisto, each unveiling nature’s wonders and some of science’s ...

Callisto, the second-largest moon of Jupiter, is covered in craters and appears, at first glance, geologically inactive. However, magnetic measurements taken by the Galileo probe in the 1990s suggest ...

The planets offer exciting views in April for both night owls and early risers. Plus, the Lyrid meteor shower peaks in ...

Twelve astronauts have walked on its surface, with future ... astronomy in 1610 when he discovered Jupiter’s four largest moons: Io, Europa, Ganymede, Callisto. These “Galilean satellites ...

Callisto, Jupiter's second-largest moon, may have a rocky surface with an ocean beneath the surface.

and surface liquids (methane and ethane), making it the only world besides Earth with such features. "Callisto" can refer to either Jupiter's second-largest moon, the third-largest in the solar system ...

Jupiter and one of its many moons Ganymede ... believed that we could find a water ocean beneath Callisto’s heavily cratered, icy, rocky surface. Europa is covered by a cracked, icy surface ...