New Planet Discovered in the Solar System?

A chunk of rock and ice that may be a planet has been discovered in the farthest reaches of the solar system, astronomers announced Friday. The object, currently called 2003 UB313, orbits the sun and is larger than Pluto, traditionally considered the ninth planet in the solar system.

The news came hot on the heels of the announcement of the discovery of a separate planet-like object at the edge of the solar system–and amid fears that a rogue astronomer may been attempting to announce the UB313 discovery as his or her own.