Access
This article is part of Nature's premium content.
Published online 1 February 2006 | Nature | doi:10.1038/news060130-7
News
'Tenth Planet' found to be a whopper
Large size of 2003 UB313 fuels debate over what is and isn't a planet.
The recently discovered 'tenth planet' of our Solar System is substantially larger than Pluto, astronomers have found.
For many, the discovery that object 2003 UB313 is about 3,000 kilometres across will remove any doubt that it deserves to be called a planet.
To read this story in full you will need to login or make a payment (see right).
Comments
Reader comments are usually moderated after posting. If you find something offensive or inappropriate, you can speed this process by clicking 'Report this comment' (or, if that doesn't work for you, email redesign@nature.com). For more controversial topics, we reserve the right to moderate before comments are published.