The newcomer replacing Pluto presently goes by “Planet Nine.” If and when it finally shows up, it will get the honor of a ...

Since New Horizons' close encounter with Pluto 10 years ago, experts have come to think of the dwarf planet as much more ...

Charon is large in size relative to Pluto, and is locked in a tight orbit with the dwarf planet. A new simulation suggests how it ended up there.

They rotate as one body until Pluto pushes Charon out into a stable orbit ... system. Both systems include a moon that is a large fraction of the size of the main body, unlike other moons in the ...

Pilots don’t have real-time data about the thousands of low-orbit, sun-reflecting objects zooming around Earth. There’s a fix ...

A researcher has used advanced models that indicate that the formation of Pluto and Charon may parallel that of the Earth-Moon system. Both systems include a moon that is a large fraction of the size ...

Pluto may have got romantic to capture its largest moon, colliding and engaging in a passionate but icy 10 hour kiss with ...