Word: coronae
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Dates: during 1940-1949
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...station will be equipped with a coronagraph, a new instrument for creating artificial solar eclipses and making possible regular observations of the corona, mysterious halo surrounding the sun, and also of other phenomena of the sun's atmosphere. This instrument is the only one of its kind in the Western Hemisphere...
...studies of the solar corona will have an immediate practical importance for the forecasting of such widespread electrical storms as that which crippled the world's communication services on Easter Sunday, according to Donald B. Menzel, professor of Astrophysics...
...healthy interest-especially in total eclipses of the sun, for during the fleeting moments of totality they get their best view of the sun's prominences, feathery spurts of incandescent gas rising to heights of hundreds of thousands of miles from the solar surface; and of the corona, the sun's pearly outer envelope...
...with wide-slit spectroscopes have been able to see the prominences without benefit of eclipse, and in recent years the prominences have been studied and photographed regularly with spectrohelioscopes and spectroheliographs. Bernard Lyot of France, operating a special telescope from a mountain in the Pyrenees, managed to chart the corona of the uneclipsed sun, and Bell Telephone Laboratories have lately designed an instrument called the "Coronaviser," which sidetracks the light from the body of the sun, then scans the prominences and corona with a television pickup. But nothing equals one of Nature's own blackouts...