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Q&A Realistic Interstellar Energy Transfer

I've been reading some of the excellent answers on this question about galactic empires and it led me to imagine a reasonably realistic multi-system 'empire' might keep most or all of its populatio...

2 answers  ·  posted 5y ago by 666lumberjack‭  ·  last activity 5y ago by 666lumberjack‭

Question energy far-future future