Question: A star is 2 1 . 6 light - years from Earth. Part A: How long would it take a spacecraft traveling 0 . 9

A star is 21.6 light-years from Earth. Part A: How long would it take a spacecraft traveling 0.950c to reach that star as measured by observer on Earth? Part B:How long would it take a spacecraft traveling 0.950c to reach that star as measured by observer on the spacecraft? Part C: What is the distance traveled according to observers on the spacecraft?

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