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A spaceship travels faster than light to the nearest star and turns around and returns home...

A spaceship travels faster than light to the nearest star and turns around and returns home at the same speed, i.e., t(A) = 0, x(A) = 0, and t(B) > 0, x(B) = 0. Draw this trajectory on a world line diagram. Is there a reference frame where the traveler arrives before they left, i.e., t(B) < t(A)?

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genius_generous answered 2 years ago
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