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Astronomers find seven Earth-size planets where life may be possible

NASA's Spitzer Space Telescope has located a nearby solar system with seven Earth-sized planets, three of which circle their parent star at the right distance for liquid surface water, raising the prospect of life, research published on Wednesday showed. According to NASA, the discovery sets a new record for the greatest number of habitable-zone planets found around a single star outside our solar system. Researchers have focused on finding Earth-sized rocky planets with the right temperatures so that water, if any exists, would be liquid, a condition believed to be necessary for life.

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