Word: sky
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Dates: during 1900-1909
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Five instruments are now being used every night from sunset to sunrise to take photographs of different parts of the sky. During the day these plates are developed in the observatory dark room, by a mechanical method, recently devised by a member of the department. Twelve plates are placed at one time in a brass frame, which is kept in vertical motion by the action of a large pendulum. As the object is to get the faintest details, rather than the artistic effect of lights and shadows all plates are treated as if under exposed. In this way twenty-four...
...assistants. The plates will be developed in the Cambridge Observatory. Visually with five-inch telescope, the corona resembled that of the '89 eclipse. Two large solar protuberances were noted. Our polar filaments six seconds in diameter traced the corona about one degree. The shadow of the moon on the sky and shadow bands were well seen. Venus and Mercury were conspicuous. The inner corona was visible in the telescope some seconds after totality was over. There was no dark band around the moon's limb during the partial phase and no detail on the moon during totality...
...gallery for the display of the best work done annually by members of the club. The most important part, however, will be the studio. It is almost impossible to secure proper light and shade effects for good portrait work, without the aid of a properly arranged sky-light and curtains, and obviously such aid is not to be had by the average amateur except through such means as the studio is expected to supply...
...observe the total eclipse of the sun which occurs May 28, 1900, to discover whether or not there is an intermercurial planet. A photographic instrument has been made with nine plates arranged in three rows, attached so that a curved field can be obtained. The light of the sky around the sun at the time to the total eclipse will be sufficient to darken these plates appreciably, but not so much but that stars of the eighth magnitude will appear. The existence of a small intermercurial planet is possible and it will probably appear on the plates if it exists...
...planets revolving inside the orbit of Mercury will be taken under the direction of Professor W. H. Pickering. The sun will be obscured for one minute and a half, and it is hoped that during this time a new planet may be discovered. Pictures of that part of the sky where the eclipse is to occur are how being taken to form a basis of comparison...