Scientists discover new planet orbiting nearest star to solar system
by Ian Sample Science editor from on (#5W08P)
Proxima d is the third planet to have been spotted circling Proxima Centauri four light years away
Astronomers have found evidence for a new planet circling Proxima Centauri, the nearest star to the sun.
The alien world is only a quarter of the mass of Earth and orbits extremely close to its parent star, at one tenth of the distance between the sun and Mercury, the solar system's innermost planet.
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