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Q&A How to get the speed of my spaceship?

I have a spaceship that can get to speeds very close to the speed of light. How can this ship measure how fast it is going near the speed of light? I would think one would measure how fast other ...

2 answers  ·  posted 5y ago by sirzento‭  ·  last activity 5y ago by sirzento‭

Question space travel spaceships space-travel ships