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Astronomy

The Search for Proxima b: Atmosphere and Habitability

Quick fact

Proxima b orbits in the habitable zone of its star, but it receives about 650 times more high-energy X-ray radiation than Earth, which could strip away its atmosphere within a billion years if unprotected.

Why this is interesting

Proxima b is the closest known exoplanet to us, but could it really host life? Its atmosphere—if it has one—might hold the answer.