. The Astrophysical journal. \iolet Ultra-violet Monochromatic Photographs of Jupiter MONOCHROMATIC PHOTOGRAPHY OF PLANETS 317 have clearly demonstrated that we can obtain clear photographsthrough a blue haze by means of the spectrum region above X these photographs it will be remembered that the blue sky comesout black and the grass and foliage show white. (See PhysicalOptics, 2d ed., p. 626.) Photographs of Jupiter made with the four ray-filters showeddifferences almost as marked as those found in the case of Saturn,though not so striking by casual inspection. The rotation of theplan
. The Astrophysical journal. \iolet Ultra-violet Monochromatic Photographs of Jupiter MONOCHROMATIC PHOTOGRAPHY OF PLANETS 317 have clearly demonstrated that we can obtain clear photographsthrough a blue haze by means of the spectrum region above X these photographs it will be remembered that the blue sky comesout black and the grass and foliage show white. (See PhysicalOptics, 2d ed., p. 626.) Photographs of Jupiter made with the four ray-filters showeddifferences almost as marked as those found in the case of Saturn,though not so striking by casual inspection. The rotation of theplanet is so rapid that it was found necessary to make the seriesof pictures as quickly as possible, if comparable results were to beobtained. Following was accomplished by bringing one of theouter satellites on the cross-hair of the eyepiece in the movableplate-holder. The exposure times were two seconds for the violetand yellow negatives, seven seconds for the ultra-violet, and ninetyseconds for the infra-red. The dark belts a
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Keywords: ., bookcentury1800, bookdecade1890, booksubjec, bookyear1895, jupiter
