What is Proxima b actually like?

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Proxima b is one of the closest exoplanets to Earth, and a potentially habitable exoplanet. But what is it actually like? Could Proxima b have life? Or is it uninhabitable?

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A few sources
Discovery of Proxima b: https://www.nature.com/articles/natur...
AU Microscopii might be blowing away water: https://science.nasa.gov/missions/hub...
Proxima b could be observed by James Webb: https://ui.adsabs.harvard.edu/abs/201...
TRAPPIST-1 b has no significant atmosphere: https://arxiv.org/abs/2303.14849 (just be aware this has recently been challenged)
YZ Ceti b potential magnetic field: https://arxiv.org/abs/2304.00031
Proxima b doesn't transit: https://academic.oup.com/mnras/articl...
Proxima Centauri can become 68 times brighter than normal during flares: https://arxiv.org/abs/1804.02001
Study about red dwarf XUV radiation and planetary atmospheres: https://arxiv.org/abs/1204.0275
L 98-59 d might have an atmosphere: https://arxiv.org/pdf/2408.15855

Footage in this video made using Space Engine