determine whether 2003 UB 313 is classified as a planet. Until then, the discussion continues . Like Pluto and Charon, Eris also has a moon, Dysnomia . 2003 UB 313 and S/2005 (2003 UB 313 ) (aka Eris and Dysnomia)   Centaurs (love that name) are icy planetoids between Saturn and