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Proxima Centauri b is a recently discovered Exoplanet orbiting Proxima Centauri. It is the closest Exoplanet to Earth and it could lay within Proxima Centauri's habitable zone. The estimated temperature, assuming it has no atmosphere is -39°C. It would be around 7°C if it had an Earth-like atmosphere and albedo. Due to its close proximity of its red dwarf star, it is most likely tidally locked.