Word: earthly
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Dates: during 1950-1959
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Explorer IV sped into space with a double task firmly impressed on its electronic senses. It must report on the belt of radiation, probably particles from the sun, that was found by Explorer III about 600 miles above the earth's surface. And it must tell U.S. scientists more than they yet know about cosmic rays...
...northeast from Cape Canaveral, its course shaving Cape Hatteras and passing just to the east of New England, Nova Scotia and Newfoundland. The earlier Explorers, fired somewhat south of due east, never came farther north than the latitude of Atlanta, but Explorer IV reaches 51° north. As the earth turns inside its orbit, it will pass over most of western Europe, southern Russia (but not Moscow), all of the U.S. and Japan, most of China, all of the tropics and most of the land in the Southern Hemisphere except Antarctica...
...northerly orbit permits Explorer IV to report more fully on cosmic rays, which vary in intensity from the poles to the equator. But the satellite got less launching throw (205 m.p.h. less than Explorer III) from the west-to-east turning of the earth...
...satellite's radio signals were picked up all around the earth on its first trip, which took about in minutes. Its high point is 1,400 miles above the earth, its low point 170 miles. It will probably stay up for several years...
Scattered thinly over the earth's surface are large patches of tektites-glassy lumps up to several inches across, of mysterious and probably unearthly origin. In Britain's Nature, American Chemist Truman P. Kohman, writing from West Germany's Max Planck Institute for Chemistry, argues that tektites must come from outside the solar system...