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Science@NASA

Kepler Discovers Earth-size Exoplanets

20 Dec 2011, 21:54 UTC
Kepler Discovers Earth-size Exoplanets

NASA's Kepler spacecraft has found two Earth-sized planets orbiting a distant sun-like star. These alien worlds are intermingled in their star system with other much larger planets, an arrangement which challenges orthodox ideas of how planets are formed.

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