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Q&A How small could an Earth-like planet be while still realistically being able to sustain human life?

I'm thinking a planet orbiting a nearby star colonized by human settlers sometime in the not near, but not too distant future. How small could a planet be while still standing in as a relatively c...

4 answers  ·  posted 10y ago by akaddoura‭  ·  last activity 7y ago by akaddoura‭

Question space planets gravity habitability