Recent flybys of the fiery world refute a leading theory of its inner structure—and reveal how little is understood about ...

Three of Jupiter’s moons – Europa, Ganymede and Callisto – are home to large, underground oceans of liquid water that could support life. This composite image shows, from top to bottom ...

Whereas Io is the poster child for this mechanism, tidal heating also heats many other worlds, including Io’s neighbor, the icy moon Europa, where the heat is thought to sustain a subterranean ...

“Europa is the size of Earth’s moon,” says Lunine. “Ganymede is the size of Mercury.” Jupiter has around 100 moons, but its four largest, the Galilean moons—Io, Europa ...

But since NASA extended Juno's mission, the team has also used the instrument to study the moons Io, Europa, Ganymede, and ...

Three of Jupiter’s moons – Europa, Ganymede, and Callisto – are home to large, underground oceans of liquid water that could support life. This composite image shows, from top to bottom, Io, Europa, ...

But since NASA extended Juno’s mission, the team has also used the instrument to study the moons Io, Europa, Ganymede, and ...