If there was a contest for the most interesting moon in our solar system, Callisto would be a contender. Jupiter's ...

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 ...

More pocked with craters than any other object in our solar system, Jupiter's outermost and second-biggest Galilean moon, Callisto, appears geologically unremarkable. In the 1990s, however ...

New evidence from an old NASA mission supports the theory that Jupiter's moon Callisto is in fact an ocean world. Credit: NASA / JPL / DLR A moon of Jupiter about the size of Mercury likely has a ...

Callisto is also thought to have liquid water, too. The small, rocky body is constantly being stretched and compressed by Jupiter’s huge gravitational force, keeping the moon ‘malleable ...

NASA's Europa Clipper is about to use Mars' gravitational pull to slingshot itself towards Jupiter's smallest moon later this ...

The JUICE mission aims to explore Jupiter's icy moons—Ganymede, Callisto, and Europa—believed to harbor subsurface oceans, a key factor for potential extraterrestrial life.

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

In late January this year, NASA’s Psyche spacecraft turned its cameras to the sky and captured some incredible images. The ...

A total lunar eclipse occurs this month. Venus transitions from evening to morning, while Mars and Jupiter dominate the late ...