Callisto is Jupiter's second-largest moon and the outermost of the Galilean satellites. Here we explore this (not so) dead moon in more detail.

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, NASA's ...

Callisto is also home to an emerging mystery: The moon's thick atmosphere holds a surprising amount of oxygen, and scientists aren't sure why.

Scientists using old flyby data from NASA's Galileo mission have found stronger evidence that Jupiter's moon Callisto has an ocean.

The spacecraft will also whirl past Jupiter's second-largest moon Callisto 21 times and conduct 12 flybys of Ganymede, according to the mission launch kit.

Gross protocol In The Callisto Protocol, players try to escape the Black Iron Prison on Jupiter’s Callisto moon after a mysterious alien force attacks, killing and destroying anything in its way.

The Callisto Protocol is set to be the spiritual successor to EA's beloved and critically-acclaimed franchise, but is it worth your time?

A waning Moon brings out deep-sky objects, Comet Tsuchinshan-ATLAS still stuns, and moons of Saturn and Jupiter stand out in the sky this week.

Jupiter’s moon Europa is reported to have water-vapor geysers erupting into space. The Callisto moon is believed to be a possible destination for humans because of its distance from the gas ...

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 ...