ESA's Mars Express orbiter captured footage of the Mars' moon Deimos pass in front of Ganymede, Europa, Jupiter, Io and ...

Larger than both Mercury and Pluto and only a third smaller than Mars, Ganymede has a diameter of 3,273 miles/5,268 kilometers. It’s the largest moon and the ninth-largest object in the Solar ...

Enceladus likely has a warm salty ocean, and liquid water lurks beneath the surface of Ganymede.The red planet Mars harbors evidence of being flooded by oceans and life forms, long ago. These ...

Of course, there’s still a lot we don’t know about planets like Jupiter and its moon, Ganymede. In fact, the closest we’ve come to the Ganymede itself is 645 miles.

While you’re trained on Jupiter for its conjunction with Mars, watch a triple event as the shadows of Io and Europa, as well as Io itself, cross the planet’s disk. Not shown are Ganymede to ...

With the new evidence, Ganymede, ... the geologically dead Jovian moon Callisto and the planet Mars. Earth has the only confirmed bodies of water in liquid form anywhere in the cosmos. ...

A new study revealed that a massive asteroid may have hit Jupiter’s moon Ganymede about 4 billion years ago, shifting the moon on its axis.

A new study revealed that a massive asteroid may have hit Jupiter’s moon Ganymede about 4 billion years ago, shifting the moon on its axis.