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Harold Ewen

American astrophysicist and physicist (1922-2015) · United States · On the map · Scientists · Died at 93

Harold Irving "Doc" Ewen was an American physicist, radio astronomer, and business executive. He served in the United States Navy in World War II as a second lieutenant. As a graduate student under Edward M. Purcell, he was the first to detect the galactic 21-cm hydrogen line.

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