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 ...

You thought Saturn's 146 moons were impressive? Think again. The ringed planet's moon count has nearly doubled with the ...

One of those moons is two-toned Iapetus, which has a light and a dark hemisphere. The moon rotates as it orbits the planet, changing brightness depending on which side is facing Earth. At eastern ...

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 catch up. On March 11, a team of astronomers announced the discovery of 128 ...