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 planetary ...

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, NASA's ...

Astronomers have uncovered new evidence that Jupiter’s moon Callisto likely harbors a massive underground ocean, potentially ...

New evidence from an old NASA mission supports the theory that Jupiter's moon Callisto is in fact an ocean world. A moon of Jupiter about the size of Mercury likely has a several-miles-deep ocean ...

Yes, even Jupiter's moons produce auroras. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. In a landmark observation by a team of international ...

Could the icy moons of our solar system hold life beyond our planet? Keith Cooper looks at how planetary scientists plan to ...

The Celestron NexStar 8SE is a great choice for exploring both the moon and the planets of the solar system beyond in exquisite detail. For a more detailed look, you can check out our Celestron ...

Callisto, Jupiter's second-largest moon, may have a rocky surface with an ocean beneath the surface. If there was a contest for the most interesting moon in our solar system, Callisto would be a ...