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Q&A Could an advanced species, having evolved on a large planet with a deep gravity well, be helped out of it from above?

Suppose an intelligent species evolved on a large rocky planet, one with sufficient mass that the species had little hope of developing anything anytime soon that could achieve escape velocity. The...

5 answers  ·  posted 9y ago by Doug‭  ·  last activity 8y ago by Doug‭

Question planets physics technology gravity