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In the late nineteenth century unsuccessful attempts were made to detect celestial radio emission. US engineer Karl G. Jansky, while working at Bell Laboratories in 1932, was the first to detect noise coming from the region near the center of our galaxy, the Milky Way, during an experiment to locate distant sources of terrestrial radio interference.
In 1943 Reber also discovered the long-coveted radio emission of the Sun. Solar radio emission had been detected a few years earlier, when strong solar bursts caused interference in British, American and German radar systems, designed to detect airplanes.
As a result of the great progress made during World War II on radio antennas and sensitive receivers, radio astronomy flourished in the 1950s. Scientists adapted war time radar techniques to build various radio telescopes in Australia, Britain, The Netherlands, the United States and the Union of Soviet Socialist Republics, and soon the interest of professional astronomers was aroused.
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