Word: earthed
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Dates: during 1960-1969
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Besides observing the sun, the OSO-VI telescope has measured the absorption of ultraviolet light by the earth's upper atmosphere an important factor in the earth's weather...
...visible light region of this spectrum would show up as color bands, but the invisible ultra-violet rays can be detected only by a special electric tube. In the experiment, this tube acts like a television camera, converting the ultra-violet rays to electric impulses that are transmitted to earth...
...violet spectrum very close to the region measured by OSO-VI. The rocket's readings actually overlapped OSO's in one small region, and the two instruments thus double-checked each other's operation. After four minutes of observation above White Sands, New Mexico, the rocket parachuted back to earth. "It was recovered so well that to a casual glance, you could not really be sure it had been launched," Parkinson said. The rocket will be repaired and flown again sometime next year...
...same group of scientists maintains a laboratory to duplicate the sun's heat for a few millionths of a second. By studying gases' spectra on earth at these high temperatures (roughly 10,000 F.), they can interpret the sun's spectra detected by the Harvard telescope...
...Apollo telescope project will also permit detailed photographs to be taken and returned to earth by the astronauts. The flight instruments for this 1972 mission will arrive here in January for testing...