Question

If astronauts could travel at v = 0.951c, we on Earth would say it takes (4.20/0.951)...

If astronauts could travel at

v = 0.951c,

we on Earth would say it takes

(4.20/0.951) = 4.42

years to reach Alpha Centauri, 4.20 light-years away. The astronauts disagree.

(a) How much time passes on the astronauts' clocks?
years

(b) What is the distance to Alpha Centauri as measured by the astronauts?
light-years

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