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Nature 447, 7 (3 May 2007) | doi:10.1038/447007a; Published online 2 May 2007

Open Innovation Challenges

Long odds on a long shadow

Katharine Sanderson

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Astronomers take a gamble on Earth-like planet.

Astronomers may make a major step forward in studying planets around other stars as early as next week — but the odds are strongly against them.Last week's announcement by Stéphane Udry and his colleagues at the Geneva Observatory that they had found a planet in the 'habitable zone' of the red dwarf Gliese 581 caused a great deal of excitement (S.

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