What is the name of the tenth planet?
The 10th most recently named planet is known as Eris. It is 27% bigger than Pluto, and has a moon now called Dysnomia. It was formerly known as 2003UB313. Both Eris and Pluto have been reclassified as “dwarf planets” in the last few years because new methods of defining planets have been developed. Look here for more information: www.space.com/scienceastronomy/050729_new_planet.
