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Q&A Designing cities inside a hollowed-out asteroids

When I was a kid, I read an essay by Asimov describing an inside-out asteroid: (summary from Wikipedia) The Bubbleworld or Inside/Outside concept was originated by Dandridge M. Cole in 1964....

4 answers  ·  posted 9y ago by JDługosz‭  ·  last activity 7y ago by JDługosz‭

Question space cities space-constructs megastructures gas