If there was a contest for the most interesting moon in our solar system, Callisto would be a contender. Jupiter's second-largest moon has more impact craters on its surface than any other ...

But it hasn’t always been this way. Jupiter’s four largest moons – Io, Europa, Ganymede and Callisto – were the first ever discovered orbiting another planet. They were spotted by Galileo ...

For instance, last year, the European Space Agency's Jupiter Icy Moon Explorer (JUICE) — which will also be exploring Europa, in addition to its larger cousins Ganymede and Callisto ...

But that hasn’t always been the case. Jupiter’s four largest moons—Io, Europa, Ganymede, and Callisto—were the first to be discovered orbiting another planet. Galileo Galilei spotted them ...

Fluorescent caves deep below America show how alien life could exist on one of Jupiter's moons, say scientists. The chemistry in Wind Cave, South Dakota, means that, under an ultraviolet (UV ...

"It's like a game of billiards around the solar system, flying by a couple of planets at just the right angle and timing to build up the energy we need to get to Jupiter and Europa." Today (March ...

"Sure enough, we found 128 new moons." Jupiter and Saturn have taken turns hosting the most known moons. Jupiter's current number of known moons is 95, and that number is expected to rise.

The moon lander captured the first ever HD imagery of a sunset as seen from the moon, and the images have been stitched together into a video. The stunning footage shows the sun setting over the ...