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 ...

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

A stunning Blood Moon March 13/14 caps off plenty of planetary action and sparkling stars in the sky this week.

A groundbreaking discovery has reshaped our understanding of water ice under extreme conditions. Scientists led by Livia Bove ...

The Moon’s illumination is given at 12 ... At the time shown here, Io has just emerged from eclipse within Jupiter’s shadow; Callisto lies farther east. Credit: Astronomy: Roen Kelly Those ...

Using data collected by NASA's Juno spacecraft as it flew past Jupiter's highly volcanic moon Io in late 2023 and again in ...

Scientists believe that the moons are remnants of larger objects shattered by ancient collisions, a glimpse into the chaotic early solar system.

NASA’s Juno spacecraft identifies over 40 enormous lava lakes on Io, shedding light on the extreme volcanism sculpting Jupiter’s moon.