Ruled by Hades, the god of the underworld, the infernal rivers of Greek mythology are often mentioned in ancient literature.

While Charon is currently listed as a satellite or moon by the International Astronomical Union (IAU), consideration is being given to it perhaps being classified as a dwarf planet in its own right, ...

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 ...

It might also have resulted in the formation of Pluto’s four other known moons — Nix, Styx, Kerberos and Hydra — which are tiny compared with Charon and were glimpsed when NASA’s New ...

New research suggests that billions of years ago, Pluto may have captured its largest moon, Charon, with a very brief icy "kiss." The theory could explain how the dwarf planet (yeah, we wish Pluto was ...