Ganymede, Callisto, Io, and Europa—their unique features, and their potential to reveal extraterrestrial life.

A colossal asteroid slammed into Jupiter's largest moon Ganymede with so much power it dramatically and permanently reoriented the moon roughly 4 billion years ago, new research suggests.

Ganymede, the biggest moon in the solar system ... It's also the only one of Jupiter's four large Galilean moons (the others being Europa, Callisto and Io) whose surface is dominated by furrows ...

Why just these four? Why not also, say, Mercury, Jupiter's biggest moons, our moon? How did those lucky four come by their atmospheres? It turns out that getting an atmosphere—and holding on to ...

New simulations show that Jupiter's massive moon Ganymede was ... 90-mile-wide asteroid around 4 billion years ago. The colossal collision was likely one of the biggest asteroid impacts the ...

About the same diameter as Earth’s moon, the innermost of Jupiter’s four giant moons is covered ... pull of Jupiter and three of its other largest moons—Europa, Ganymede and Callisto ...

The Jupiter Icy Moons Explorer (Juice) spacecraft, barreling through our solar system, recently used Earth's gravity to ...

Jupiter, the solar system's largest planet, is seen alongside ... 900-million-kilometer journey towards Jupiter and its moons for a four year mission. Set to arrive in 2031, JUICE will see ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. A colossal asteroid slammed into Jupiter's largest moon Ganymede with so much power it ...