If astronauts could travel at v _ 0.950c, we on Earth
Chapter 26, Problem 26.21(choose chapter or problem)
If astronauts could travel at v _ 0.950c, we on Earth would say it takes (4.20/0.950) _ 4.42 years to reach Alpha Centauri, 4.20 light-years away. The astronauts disagree. (a) How much time passes on the astronauts clocks? (b) What is the distance to Alpha Centauri as measured by the astronauts?
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