Date- 20th Dec 11 Source- http://www.nasa.gov/centers/goddard/home/index.html 'NASA's Kepler mission has discovered the first Earth-size planets orbiting a sun-like star outside our solar system. The planets, called Kepler-20e and Kepler-20f, are too close to their star to be in the so-called habitable zone where liquid water could exist on a planet's surface, but they are the smallest exoplanets ever confirmed around a star like our sun. For more information about the Kepler Mission, please visit http://www.nasa.gov/kepler '
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