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Q&A How long does terraforming take if you have to build the planet from asteroids?

I'd like to set a story in our solar system with Earth and the inner planets becoming uninhabitable and a new planet being required. If human beings decided to build a world by making slight deviat...

6 answers  ·  posted 10y ago by trichoplax‭  ·  last activity 7y ago by trichoplax‭

Question space planets physics orbital-mechanics