Astronomers claim 10th planet
Astronomers claim 10th planet:
"US astronomers have discovered an object in the outer reaches of the solar system -- a rock bigger than pluto, which they labelled as the 10th planet.
If confirmed, the discovery would be the first of a planet since pluto was identified in 1930.
'Get out your pens. Start re-writing textbooks today,' Mike Brown, a planetary scientist at the California Institute of Technology, said announcing the discovery."