Astronomers discover closest super-Earth

Using NASA’s Spitzer Space Telescope, astronomers have discovered the nearest rocky planet outside our solar system, Astronomy magazine reports. Even though it is larger than Earth and too close to the star to be habitable, astronomers believe this super-Earth, named HD 219134b, might be a potential gold mine for science data for decades to come. This exoplanet is merely 21 light-years away from us, practically a next-door neighbor in astronomical terms. 

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