In Partnership with AOL Search
Originally considered a planet, then an asteroid, and now a dwarf planet, Ceres is the largest body in the asteroid belt.
Unofficially called Xena by its discoverer, this is a Kuiper Belt object roughly the same size as Pluto.
Copyright © 1998-2016 AOL Inc. Terms of Use
Last update: Friday, January 5, 2007 4:28:22 PM EST - edit