Two valleys extending away from a giant crater suggest that upcoming Artemis missions are more likely to sample ancient lunar ...

When Giovanni Cassini discovered Iapetus in 1671, he noted that the moon had one side much darker than the other, as he could only see Iapetus when it was on the west side of Saturn. Iapetus also ...

Gonggong is a dwarf planet and a member of the scattered disc beyond Neptune. As of 2019, its distance from the Sun is 88 AU, and it is the sixth-farthest known Solar System object.

Not that it was a competition, but Saturn surpassed Jupiter in known moons a few years ago. Now the giant planet may never ...

The arcs near the center are the orbits of Titan and Iapetus, two of Saturn's large outer moons. For scale, the white circle under the scale bar is the orbit of the moon around the Earth.