BBC News - Science & Environment: Astronomers confirm 'Earth twin'

BBC News - Science & Environment The latest stories from the Science & Environment section of the BBC News web site.

Astronomers confirm 'Earth twin' Dec 5th 2011, 17:50 Astronomers confirm the existence of an Earth-like world orbiting a star like our Sun in its "habitable zone" - at a balmy 22C.

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