NASA discovered seven earth sized exoplanets

National Aeronautics and Space Administration(NASA) discovered seven earth size exoplanets orbiting a single star in the Trappist-1 system. Spitzer Space Telescope of NASA has revealed it. Three of these planets are firmly located in the habitable zone, the area around the parent star where a rocky planet is most likely to have liquid water.

The discovery sets a new record for greatest number of habitable-zone planets found around a single star outside our solar system. All of these seven planets could have liquid water under the right atmospheric conditions, but the chances are highest with the three in the habitable zone.

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