Karl Guthe Jansky (1905-50) American radio astronomer, at Holmdel, New Jersey, with his directional radio aerial system, the precursor of today's radio telescopes.

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Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
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Keywords: 1905-50, aerial, american, archival, archive, astronomer, astronomy, directional, guthe, historical, history, holmdel, jansky, jersey, karl, precursor, radio, system, telescopes., today