• December 29, 2011

    Episode 370: Kepler finds Earth-like planets

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    NASA's Kepler mission, launched in March 2009, is observing 150,000 stars to discover planets. The ultimate goal is to discover Earth-sized planets, and in particular, Earth-sized planets in the zone around the parent star that is the right temperature for water. Over 1,000 planet candidates from Kepler have been cataloged, mostly planets larger than Earth. Now Kepler has announced the discovery of several nearly, Earth-sized planets, one right in the habitable zone. It's a new, exciting milestone in the search for an Earth twin.