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ASTRONOMY Exoplanets Proxima Centauri b

Proxima Centauri b

Proxima Centauri b orbits the closest star to our Sun within its habitable zone

11 Nov 2025

What is a major challenge to the potential habitability of Proxima Centauri b despite its location in the habitable zone?

Its orbit is too far from Proxima Centauri to receive enough heat for liquid water. Intense electromagnetic radiation from its flare star host could strip away its atmosphere. Proxima Centauri b is a gas giant, making it unlikely to support life.