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Q&A How would an advanced civilization have constant communication between planets?

In this universe humans have advanced far enough to be able to colonize planets in our system but not enough to do interstellar travel. Earth is united and they have moved beyond countries and bord...

11 answers  ·  posted 8y ago by John Hamilton‭  ·  last activity 5y ago by John Hamilton‭

Question space communication solar-system colonization space-colonization