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describe the exoplanet proxima centauri b
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proxima centauri b is an earth-like exoplanet orbiting in the habitable zone of proxima centauri, a red dwarf star located 4.2 light-years away from earth. the planet was discovered in 2016, and is the closest known exoplanet to earth. the exoplanet is at least 1.17 times the mass of earth and is believed to have a rocky composition and possibly liquid water on its surface.
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