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Who for the first time observed that the universe is expanding and that the galaxies are receding away from each other?
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A
Edwin Hubble
💡 Explanation:
Edwin Hubble was the first to observe that the universe is expanding and galaxies are receding from each other. This became known as Hubble's Law (1929), showing that galaxies are moving away from us at speeds proportional to their distance - a fundamental discovery in cosmology.