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 ...

In the 1990s, however, NASA's Galileo spacecraft captured magnetic measurements near Callisto that suggested that its ice shell surface—much like that of Europa, another moon of Jupiter—may ...

The surface of Europa – one of Jupiter’s moons – is a thick layer of solid ice. Credit: NASA/JPL-Caltech/SETI Institute, CC BY-SA This article was originally featured on The Conversation.

A massive NASA spacecraft is ready to set sail for Jupiter and its moon Europa. The craft named Europa Clipper will peer beneath the moon’s icy crust and determine whether conditions there could ...

A NASA spacecraft is ready to set sail for Jupiter and its moon Europa, one of the best bets for finding life beyond Earth.

A NASA spacecraft has set sail for Jupiter and its moon Europa, one of the best bets for finding life beyond Earth.

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 ...