If there was a contest for the most interesting moon in our solar system, Callisto would be a contender. Jupiter's ...

And it doesn’t stop there. Callisto is also thought to have liquid water, too. The small, rocky body is constantly being stretched and compressed by Jupiter’s huge gravitational force ...

These pinpricks of light are actually Jupiter's four largest moons, now known as the Galilean moons: Io, Europa, Ganymede, and Callisto. Many of these celestial orbs are as remarkable as Jupiter ...

Earlier this week, Saturn gained a whopping 128 new official moons, as the International Astronomical Union recognised ...

39.69 x 21.59 cm. (15.6 x 8.5 in.) Subscribe now to view details for this work, and gain access to over 18 million auction results. Purchase One-Day Pass ...

In late January this year, NASA’s Psyche spacecraft turned its cameras to the sky and captured some incredible images. The twin cameras onboard, part of the spacecraft’s imaging system, photographed ...

Europa is the sixth largest satellite in our Solar System and the smallest of Jupiter’s four Galilean moons. Discovered by ...

At the time shown here, Io has just emerged from eclipse within Jupiter’s shadow; Callisto lies farther east. Credit: Astronomy: Roen Kelly Io, Europa, Ganymede, and Callisto orbit Jupiter with ...