Pluto has regained its position as the ninth largest body to orbit the …

When scientists first discovered the dwarf planet Eris back in 2005, they claimed that the icy body was actually larger than Pluto. But when Eris' orbit passed in front of a dim star late last year, astronomers got their first chance to take a good hard look at the dwarf planet's actual diameter. And as it turns out,… » 10/28/11 11:40am 10/28/11 11:40am