@CNN: Astronomers have found a frozen exoplanet more than three times the mass of Earth, orbiting a star that’s only six light-years away — the second-closest known exoplanet https://t.co/DA6m7HrwyC https://t.co/CcblA6i4uu

@CNN: Astronomers have found a frozen exoplanet more than three times the mass of Earth, orbiting a star that’s only six light-years away — the second-closest known exoplanet https://t.co/DA6m7HrwyC https://t.co/CcblA6i4uu