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Radio Telescope1 - Radio Telescopes Radio astronomy has its...

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Radio Telescopes Radio astronomy has its roots back in the 1930's when Karl Jansky accidentally detected radio emission from the center of the Milky Way as part of his research on the interference on transatlantic phone lines. The British advanced radio antenna technology in their development of radar technology to fight the German warplanes in World War II. After the war, astronomers adapted the technology to detect radio waves coming from space. The Robert C Byrd Green Bank Telescope (GBT) is the largest fully steerable radio telescope in the world; a much- improved replacement for the former 100-meter radio telescope. Although it has an unusual off-axis design to improve sensitivity and reduce distortions , the basic principles are the same as described in the cartoon at left. This image shows the underside lattice supports of the main reflector dish. Select the image to bring up an enlargement of the image. A zoomed-in image of the GBT is also available at this link ( ask
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