A man leaves his identical twin brother behind to live on another planet that is half as

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A man leaves his identical twin brother behind to live on another planet that is half as massive. After living apart for many years, the two brothers are reunited on the original planet. According to general relativity, which of the two brothers is now younger than the other? Please explain.

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Conceptual Physical Science

ISBN: 978-0134060491

6th edition

Authors: Paul G. Hewitt, John A. Suchocki, Leslie A. Hewitt

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