Naming of moons underworld, and Nix (a respelling of Nyx), mother of Charon, is the goddess of darkness and the night. Kerberos is a giant three-headed dog who guards the entrance to the underworld. The fifth moon is named for the river Styx that forms the boundary between the worlds of the living and the dead. The name of Eris's moon Dysnomia was suggested by its discoverer Michael E. Brown, who also suggested the name of the dwarf planet. The name has two meanings: in mythology Dysnomia (lawlessness) is the daughter of Eris (chaos). However, the name is also an intentional reference to
Ghidorah, the Three-Headed Monster piece." Ghidorah, the Three-Headed Monster It is the fifth film in the "Godzilla" franchise and Shōwa series and was the second "Godzilla" film produced that year; production began following "Mothra vs. Godzilla". This film also marks the first appearance of King Ghidorah, a recurring antagonist of the "Godzilla" franchise. The film was released in Japan on December 20, 1964 and was given a theatrical release in the United States in September 1965 by Continental Distributing as "Ghidrah, the Three-Headed Monster". Police Detective Shindo (Yosuke Natsuki) is assigned to guard Princess Selina Salno of Selgina (Akiko Wakabayashi) during the Princess' visit