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Q&A What forces would make leaving a planet impossible?

My idea is to have a place that is "inescapable" by any conventional propulsion system, except it has Earth-like conditions: a breathable atmosphere, 1.0g gravity, etc. What would have to be the c...

5 answers  ·  posted 8y ago by GideonKain‭  ·  last activity 8y ago by GideonKain‭

Question atmosphere gravity black-holes