The characteristic wavelengths of light emitted by a distant star are observed to be shifted toward the

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The characteristic wavelengths of light emitted by a distant star are observed to be shifted toward the red end of the spectrum. What does this suggest about the motion of the star relative to the earth?

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The Physical Universe

ISBN: 978-0077862619

16th edition

Authors: Konrad B Krauskopf, Arthur Beiser

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