If astronauts could travel at 0970c we on earth would say, Physics

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If astronauts could travel at 0970c we on earth would say

If astronauts could travel at 0.970c, we on earth would say it takes (4.20/0.970) = 4.33 years to reach Alpha Centauri, 4.20 light-years away. How much time passes on the astronauts clock? What is the distance to Alpha Centauri as gauged by the astronauts?

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