Radio Astronomy

The first of the new radiations to be explored, however, were the radio waves—for the simple reason that many of them reach Earth intact. Radio signals from the sky were first detected by US engineer Karl Jansky in 1932. He realized that the signals peaked when the Milky Way was in view, but took the research no further. The earliest dish antenna was built a few years later by another American, Grote Reber, but the first of the huge radio telescopes, pioneered in Britain by Bernard Lovell,

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