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Q&A Interstellar Propulsion for Hard Sci-fi Novel

Hypothetical: Hundreds of years into the future. Humanity needs to travel to exoplanets quickly. I'm aiming for hard sci-fi. What kind of propulsion can travel people at 0.1 - 0.9 lightspeed? Is i...

1 answer  ·  posted 6y ago by William Davis‭  ·  last activity 6y ago by William Davis‭

Question space travel reality-check space-travel far-future interstellar-travel future interstellar