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Q&A What Is The Minimum Size Of A Planet To Harbor Human Life?

What is the minimum size of a planet that could harbor human life? You get to decide what the atmosphere is, but I'm reasonably sure that O2, CO2, and H2O are necessary components of the atmosphere...

2 answers  ·  posted 9y ago by Xandar The Zenon‭  ·  last activity 8y ago by Xandar The Zenon‭

Question atmosphere reality-check planets humans habitability