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

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 ...

A song about being picked up and taken away by aliens, Come Sail Away gave Styx a career boost and eventually took on a life ...

In the play, an old Housman dreams that he is dead. As Charon, the mythical boatman, ferries him across the River Styx, Housman returns to the Oxford of his youth where he fell in love with ...

Charon, discovered in 1978, is, depending on the definition employed, either the largest moon of Pluto or one member of a double dwarf planet with Pluto being the other member.

Pluto might have hogged much of the spotlight historically, but the dwarf planet is actually part of a double act, alongside its biggest satellite, Charon. A new analysis suggests that Pluto used ...

Charon measures half of Pluto's diameter, making it approximately 754 miles across. This size ratio makes the Pluto-Charon system a rarity, often referred to as a binary planet system.