10th planet is bigger than Pluto.
Astronomers announced the existence of the "planet", code-named UB313, last summer. Since then, debate has raged over whether it really is a planet or a frozen comet.
The object is one of about 100,000 icy bodies that lie in a ring known as the "Kuiper Belt" on the outer fringe of the Solar System, more than four billion kilometres (2.5 billion miles) from the sun.
They are thought to have been left over from the formation of the sun's planetary system about 4.5 billion years ago.
UB313 is the most distant object ever seen in the Solar System using telescopes on Earth.
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|Publication:||Birmingham Mail (England)|
|Date:||Feb 2, 2006|
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