Word: antenna
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Jansky's work was wellpublicized, but it was done during the great Depression, when little cash was available to encourage scientific enterprise. Only a single radio ham, Grote Reber of Wheaton, Ill., followed Jansky's lead. Working alone, Reber built a dish antenna 31 ft. in diameter in his own backyard. With it he made the extraordinary discovery that the sky is full of radio stars that have nothing to do with ordinary stars. Reber had opened wide the radio window on the sky. His crude radio telescope, the world's first. now stands at the entrance...
Instead of taking quick pictures of large parts of the sky, radio telescopes must scan slowly, gathering details one by one. As a radio telescope's beam (its field of sensitivity) moves across the sky, the radio waves collected by the dish are focused on an antenna and detected as an extremely feeble electrical current. This current is amplified by intricate electronic apparatus until it is strong enough to move a finely balanced pen and draw a wiggly line on a strip of paper. Small wiggles mean little or nothing, but a good-sized bulge means that some object...
...important type of radio telescope does not try to observe celestial objects with a single antenna. Instead, two antennas are placed a considerable distance apart and connected electronically so that they function like parts of a single, very large dish. Since a telescope's resolution is proportionate to its width, the double antenna has a far narrower beam than a single dish. Even finer resolution is obtained by long, rocking metal troughs that gather radio waves and focus them so that they interact with waves gathered by another antenna running at right angles to the first. In Australia...
...Canadian border and as far west as New Zealand, and it has made such a hit with listeners that KEWB hopes to hook up with a sister station in Los Angeles to give Jackson the entire West for an audience. Comedian Mort Sahl, who has rigged up a special antenna in his backyard in Los Angeles in order to receive Jackson, calls him "the all-night psychiatrist." Make Love Now. Jackson stays in business because his audience finds the program engrossing and totally unpredictable, but he also does his best to dispense free comfort and wisdom to both callers...
...spacecraft's electronic nervous sys tem took over and issued commands of its own, starting a one-hour warmup period. It turned off instruments and turned on guidance gyros. It swung the directional radio antenna aside to get it out of the blast of the mid-course rocket motor. At the end of the warmup, Mariner II was ready for the crucial maneuver of its long voyage. Replaying the commands from earth, it rolled 9.33 degrees and pitched its nose around for 139.83 degrees. This turned its mid-course rocket motor forward, putting it in position to slightly reduce...