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Q&A How long would it take a matter-antimatter GeV gamma ray laser photon rocket to get to Ross128b (11 light years away)?

I'm writing a colony story, and I want my ship to colonise Ross128b, which is 11 light years away from Earth. I need the characters to be alive when they get there, but it's okay if they've aged tw...

4 answers  ·  posted 6y ago by Iona‭  ·  last activity 6y ago by Iona‭

Question space travel spaceships physics space-travel ships science-fiction