Word: belt
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Dates: during 1950-1959
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...raining down from space and concentrated around the Magnetic North Pole by the earth's magnetic field. Though Van Allen could not guess it then, the "cosmic rays" detected by his Rockoons were directly related to the northern lights, and were really a fringe of the worldwide radiation belt that he was to discover five years later...
...amazing conclusion: the earth was surrounded by a belt of intense radiation, apparently trapped by earth's magnetic field. It might be deadly enough to interfere seriously with man's attempts to fly out into space...
...studies. He proposed the launching of a new satellite in a more north-and-south orbit than any of its predecessors. Moving in this way, he explained, it would better observe the results of Project Argus. Incidentally, it would also give him coverage of the natural radiation belt in latitudes that earlier satellites had not reached...
From Pioneer III, Van Allen discovered that there are not one but two radiation belts, with a low-intensity slot between them. Studying the tapes, he concluded that the outer belt is made of weaker particles, presumably protons and electrons that come from the sun. At its outer edges, it curves downward in "horns" that hit the atmosphere near the magnetic poles. These horns were what produced the northern lights...
Most of the glop falls to Joy Myers as Ida, which is profoundly unfair, since Miss Myers is a big, beautiful girl with a big, beautiful voice, and deserves better. She can belt it out with the best of them when belting is required, but she has a comic sense unusual in a soprano, and manages, almost miraculously, to avoid giving the impression that she is about to emit a "ho-jo-to-ho," grab a horse, and make it back to Valhalla...