A new planet-like object has been found circling the Sun more than one and a half billion kilometres beyond Pluto. Quaoar, as it has been dubbed, is about 1,280 kilometres across (800 miles) and is the biggest find in the Solar System since Pluto itself 72 years ago. The object is about one-tenth the diameter of Earth and circles the Sun every 288 years. It is half Plutos size, but apparently larger than the ninth planets moon, Charon.
http://news.bbc.co.uk/1/hi/sci/tech/2306945.stm
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