What factor contributes to the difficulty of Proxima Centauri b retaining an atmosphere?
Answer
A weak magnetic field caused by slow rotation
A tidally locked planet like Proxima Centauri b may possess a weak magnetic field due to its slow rotation, which complicates the retention of an atmosphere. Without a robust magnetic field to deflect the intense high-energy radiation and stellar flares emitted by the red dwarf host star, the planet's atmosphere is at constant risk of being stripped away into space.
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