10th Planet: today 2 years ago

Today day in 2005 the 10th planet was found named Eris. However in 2006 Eris was together with Pluto and Ceres designated "Dwarf planet". From Pluto some may remember because they even petitioned to get it back to planet status. Eris is slightly bigger than Pluto and has a moon called Dysnomia.

More about Eris here