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Q&A Is it possible to break the sound barrier in space with a really fast spacecraft

I was doing some research online about slower-than-light interstellar spacecraft, and it got me thinking about a couple things. Although it may seem empty, the space between stars isn't a perfect v...

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

Question space travel spaceships space-travel ships interstellar-travel interstellar