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Unlike Earth, Venus lacks an internal dynamo and a planetwide magnetosphere that could protect any life from solar and cosmic radiation.
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Unlike Earth, Venus lacks an internal dynamo and a planetwide magnetosphere that could protect any life from solar and cosmic radiation. But it does have an extremely thick atmosphere. Planetary scientists recently simulated the atmosphere of Venus and calculated how much space radiation would penetrate down to the lower cloud deck. They found that the atmosphere is sufficiently thick to protect life at Venus's "habitable altitude" of 40–60 km.
The Venusian Chronicles
Abstract page for arXiv paper 2502.13371: The Venusian Chronicles
arXiv.org (arxiv.org)