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
Rebellion of the Three Guards Rebellion of the Three Guards The Rebellion of the Three Guards (), or less commonly the Wu Geng Rebellion, was a civil war, instigated by an alliance of discontent Zhou princes, Shang loyalists, vassal states and non-Chinese peoples against the Zhou government under the Duke of Zhou's regency in the latter 11th century BC. After the fall of the Shang dynasty, King Wu of Zhou had appointed his brothers Guanshu, Caishu and Huoshu as the "Three Guards" of the East to secure the newly conquered Shang lands. After his death and his young son King Cheng's coronation, King Wu's brother