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If a spacecraft is 475 light years away from Earth, and it can travel at 3/4ths the Speed of light. How long would it take (Earth relative time) to return?

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If a spacecraft is 475 light years away from Earth, and it can travel at 3/4ths the Speed of light. How long would it take (Earth relative time) to return?	1
If a spacecraft travels at 3/4th the speed of light. How long would it take to reach 427 light years away from Earth. From Earths relative time perspective?	1