Word: spectra
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Superimposed on a rainbow of colors ranging from short-wave-length violet light at one end to longer-wave-length red at the other, star spectra show a series of characteristic bright and dark vertical lines that indicate the presence of specific chemical elements. In 1868, one such line in a spectrogram of the sun enabled British Astronomer Norman Lockyer to detect the existence of a new element-helium-before it was discovered on the earth...
...while, astronomers tried to explain how such ordinary-looking stars could produce large quantities of radio waves. But they made no progress, and two years ago Dr. Schmidt made things worse. With Dr. Jesse Greenstein, Schmidt photographed the spectra of four of the radio-loud "stars" with the 200-in. Palomar telescope and found evidence of ultraviolet light that had increased in wave length until it became visible light...
...years of losses on its computers, RCA has twice this month raised its bid to grab more of the world wide computer market now dominated by International Business Machines. In its most costly move since entering the field in 1958, RCA brought out a new line of computers (called Spectra 70s) with integrated circuits that it claims are faster and cheaper to make than the transistor circuits that run most computers. Next, it signed a ten-year agree ment with West Germany's giant electronics and computer company, Siemens & Halske, to swap patent licenses and technical data...
Analysis of the spectra showed that above its cloud deck, the Venusian atmosphere has about 9.8 milligrams of water vapor per square centimeter. This is not much, but it is not far from the amount that is believed to exist above a comparable level in the earth's atmosphere...
...Palomar telescope can photograph swarms of galaxies out at the limit of its vision, but most of them look like blurry blobs, and they are much too faint for their spectra to be photographed. Only exploding galaxies 100 times brighter than normal give such meaningful information about what was happening billions of years ago in the depths of space. A dozen such galaxies have been found so far, and astronomers are confident that many more can be found by the kind of radio scouting that stirred up interest in 3C-147. The spectrum of their ancient light may tell whether...