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 ...

The solar system is home to bizarre moons like Enceladus and Callisto, each unveiling nature’s wonders and some of science’s ...

A student Odyssey at Libby Center in Spokane has been named as a finalist in NASA's Power to Explore Challenge.

Jupiter has four large moons – Io, Europa, Ganymede and Callisto – with diameters of more than 3000 ... The four larger moons mentioned above, also known as the 'Galilean moons', account for 99.997 ...

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 ...

Callisto lies much farther east ... 2:55 P.M. We’re back at Jupiter in Taurus this evening to watch the innermost Galilean moon, Io, now transit the disk alongside its shadow.

The goal is to reach Europa, the smallest of the planet's four Galilean moons, in April 2030 ... in addition to its larger cousins Ganymede and Callisto — performed a daring "first-ever double ...