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The "history of X-ray astronomy" begins in the 1920s, with interest in short wave communications for the U.S. Navy. This was soon followed by extensive study of the earth's ionosphere. By 1927, interest in the detection of X-ray and ultraviolet radiation at high altitudes inspired researchers ... More


Added Sep 8, 2015  

Channel Education

Duration 2:31   |   views 24


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