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SOLVED:An undiscovered planet, many light-years from Earth, has one moon, which has nearly circular periodic orbit: If the distance from the center of the moon to the surface of the planet is
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/cdn.vox-cdn.com/uploads/chorus_image/image/31711289/kepler_186f.0.jpg "Scientists found a planet 500 light-years away that could be just right for life - Vox")
Scientists found a planet 500 light-years away that could be just right for life - Vox
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