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

Researchers accounted for the previously overlooked structures of the dwarf planet and moon in computer simulations of a ...

If it’s real, some may question whether something with a mass about three times Pluto’s counts as a planet at all.

Lowell Observatory announced that Planet X would be named Pluto. But with its peculiar, tilted orbit and confoundingly small size, the world remained an enigma. Over the years the estimated mass ...

Our Moon is surprisingly massive compared to Earth, but that ratio is dwarfed if we consider Pluto and Charon. The latter is about 12 percent of the mass of Pluto and technically doesn’t orbit it.

Whereas a moon usually orbits a planet, both Pluto and Charon orbit a point in space between them — their common center of mass. The other four moons in the system — Styx, Nix, Kerberos and ...

“Pluto and Charon are different — they’re ... Binary systems form when two celestial bodies orbit around a common center of mass, like figure skaters who spin while holding hands, according ...