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Earth-size planet discovered orbiting Alpha Centauri B
An Earth-sized planet has been discovered orbiting Alpha Centauri B. The Alpha Centauri system, which includes three stars, is the star system nearest Earth - only 4.4 light years away. The discovery was made by a team of European astronomers. The planet is likely to be a rocky planet, but is not habitable, with surface temperatures of 1,200 degrees.
For more information, see http://earthsky.org/space/whoa-earthlike-planet-in-alpha-centauri-system and http://www.nytimes.com/2012/10/17/science/space/new-planet-found-in-alpha-centauri.html?_r=1&ref=science.