NASA unveiled a wealth of new data from its planet-seeking Kepler space  telescope today (Feb. 2) - observations that significantly increase the  number of possible alien planets and identify potential Earth-size  worlds, including 54 planets that could be habitable.
  "We went from zero to 68 Earth-sized planet candidates and zero to 54  candidates in the habitable zone - a region where liquid water could  exist on a planet’s surface. Some candidates could even have moons with  liquid water," said William Borucki of NASA’s Ames Research Center in  Moffett Field, Calif., the Kepler mission’s science principal  investigator. "Five of the planetary candidates are both near Earth-size  and orbit in the habitable zone of their parent stars."  
  At the same time, the space agency and a team of astronomers announced the discovery of a six-planet alien solar system,  a find also made using the Kepler observatory. The planetary system was  found around the star Kepler-11, which is 2,000 light-years from Earth The Kepler spacecraft  is the first NASA mission capable of detecting Earth-size planets in or  near the so-called habitable zone – the region in a planetary system  where liquid water can exist on the surface of the planet orbiting its  host star. Space.com

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