New Pluto-Sized Object Discovered in Solar SystemPublication: National Geographic News Date: July 29, 2005 View Article
Astronomers in Spain and the U.S. have discovered a large object skirting the fringes of the solar system. Research teams from both countries announced the discovery separately.
The object, designated 2003 EL61, is about 930 miles (1,500 kilometers) across, according to Mike Brown, an astronomer at the California Institute of Technology, who led the U.S-based team. The team announced its discovery today.