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Suppose That SETI Researchers Discovered a Radio Signal Coming from a Star

question 47

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Suppose that SETI researchers discovered a radio signal coming from a star in the direction of the centre of the Milky Way that was about 10% closer to the centre than the Sun.Humans sent a reply to this signal immediately,and the aliens replied when they got our message,how long would it take before the alien reply reached Earth?


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