NASA's Spitzer Space Telescope Discovers Record Setting Planets in Habitable Zone

NASA's Spitzer Space Telescope has discovered a planetary system known to contain seven Earth-size planets around a single star. Three of these planets are 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. 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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