4 years ago
A second planet may orbit the star closest to our sun
The planet orbiting the star closest to the sun may have a neighbor. Proxima Centauri, a dim red star just 4.2 light-years away, is already known to host one potentially habitable planet, Proxima b, that’s a bit more massive than Earth (SN: 8/24/16). Now, astronomers see hints of a second planet, this one much larger and farther from the star.
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