As you all know, Pluto has been demoted to a dwarf planet back in 2006. This of course caused some tension between people who still believed that Pluto should be considered the 9th planet. Well, as it turns out, a dwarf planet called Eris was just recently discovered to be even bigger than Pluto. Eris has an orbit that takes 560 years to complete and is about 97 AU from the sun. Like Pluto, it also has a highly elliptical orbit sometimes coming as close as 38 AU.
Here is the full details:
http://www.astronomy.com/asy/default.aspx?c=a&id=5673
What this does is that it supports the astronomical community in its decision about demoting Pluto and that Pluto may indeed be just an object of the Kuiper Belt. What are your thoughts on this?