To be Earthlike, you also need a sun like ours and Kepler-22b has that.

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They had not been rounded off by wind and erosion in an Earthlike atmosphere.

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The star has also long been thought to be a good candidate to find potential young earthlike planets.

FORBES: Move up http://i.forbesimg.com t Move down

If only a few of Kepler's possible Earthlike planets turn out to be real, that third number is likely to be in the millions.

ECONOMIST: Another Earth?

Extrapolating from these results, they think that an orbiting zone plate measuring somewhere between 15 metres and 40 metres across will be enough to distinguish the spectrum of an Earthlike planet at a distance of 30 light-years.

ECONOMIST: The search for alien life

The stakes have just been raised a notch: Not only is there another planet right next door in our own solar system that had habitable environments on its surface long ago, but there appear to have been common and recognizable -- perhaps even Earthlike -- environments on Mars.

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