Word: lighted
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Dates: during 1960-1969
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After two months in orbit 300 miles above the earth, an automatic telescope designed and assembled at the Harvard College Observatory is working perfectly. The ultra-violet light experiment aboard Orbiting Solar Observatory VI (OSO-VI) "is meeting 100 per cent of our expectations," said William H. Parkinson, lecturer on Astronomy and co-director of the project. "We've got a winner...
...pound satellite was launched from Cape Kennedy on August 9. Besides the Harvard telescope, it contains 6 other experiments designed to measure solar emissions such as x-rays, ultraviolet light and neutrons that are ordinarily blocked from view by the upper layers of the earth's atmosphere. When ever the satellite emerges from the earth's shadow, two of these devices, including Harvard's telescope, constantly scan different portions of the sun's disc and record the intensity of the sun's radiation in varying sections of the spectrum...
Ultra-violet measurements, like these, are important because ultra-violet rays from the sun occasionally interfere with earth's radio communications, and the energy from these invisible light waves supplies much of the solar heat that determines the earth's weather. Astronomers use slight, variations in the sun's ultra-violet spectrum as clues to the chemical and physical reactions goingon at various depths in the sun. By comparing satellite measurements of invisible radiation with earth-bound records of the sun's visible light, scientists should be able to predict some of these reactions and their effects on earth...
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...
...Harvard experiment is contained in a 40-inch box that is open at one end. The box is plated with gold to distribute heat evenly. A cluster of 13 light detectors-much like the electric eye on a camera-keeps the box pointed at the sun. A small telescope mirror collects solar rays coming through the open end of the box and then reflects them onto a diffraction grating, a row of closely-scaped lines that breaks the light up into a spectrum. This spectrum constantly changes as different chemical reactions occur...