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

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 ...

This slow collision would have caused a "geologic reset" for Pluto, as Charon stripped some of its ice, and potentially led to the formation of Pluto's smaller moons — Nix, Styx, Kerberos ...