Dysnomia Directory References Discover How Many Countries Are There in the World? What Is the Most Widely Practiced Religion in the World? 7 Deadliest Weapons in History Will Light-Speed Space Travel Ever Be Possible? Timeline of the Space Race, 1957–69 10 Great Sports Rivalries The Seven Sacraments of the Roman Catholic church Contents Dysnomia astronomy Ask the Chatbot a Question Ask the Chatbot a Question Learn about this topic in these articles:Eris In Eris…has at least one moon, Dysnomia, about one-eighth its size, with an orbital period about two weeks long.Read More