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A comment on Time: Yes, it's a dimension, but no, it's not like space. Parent comment

Re:Time: Yes, it's a dimension, but no, it's not like space by jiggawatts on Sunday October 20, 2024 @09:37PM (#41899961)
This is a well known paradox: https://en.wikipedia.org/wiki/Twin_paradox

TL;DR: The two scenarios are not symmetric, the person in the spaceship undergoes acceleration whereas the observer staying behind does not.

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