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.
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.