Word: stellar
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Dates: during 1890-1899
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...exhibit of the Observatory will represent the work of the United States in astronomy and all the space necessary for this exhibition will be granted. It will consist of reports from the Cambridge, Arequipa and Blue Hill observatories. Among the collection of photographs of heavenly bodies will be the stellar charts and photographs of stellar spectra produced with the aid of the great photographic telescope now in South America, the gift of Miss C. W. Bruce of New York. There also will be an exhibit of glass photography illuminated by electricity. The part that Harvard will play in astronomy...
...large portion of the investigatory work has been in the field of stellar spectra. Professor Pickering, in conjunction with others, has derived a new method of determining the relative motion of two stars in the line of sight. The method depends on the calculation, by means of photographic plates, of the relative variation in the position of the spectra of the two moving stars. There is reasonable belief that this method will enable such calculations to be made with a degree of accuracy hitherto unobtainable. The spectra of many obscure stars have been carefully studied, and in some cases, peculiar...
...process of construction. It is called a doublet, or rectilinear instrument, from the fact that it is to contain two object glasses, by which the linear distortions caused by ordinary lenses are nearly eradicated. The new telescope differs from the present Draper instrument in that it will take successive stellar photographs automatically, changing and exposing the plates according to the particular programme decided upon. The charts produced will be about eight inches square...
...Arequipa, Peru, where the Bruce telescope was moved last winter, is now under the personal direction of Professor Bailey. The difficulties met with in setting up the instrument, owing to its great size and weight, have been finally overcome. Professor Bailey has photographed a large number of excellent stellar charts of which some very fine specimens have been received in Cambridge. The main station at Arequipa controls many meteorological posts in the neighboring country. The most important of these is situated on the summit of the volcano El Misti, 19200 feet above the level of the sea. At this high...
...announcement has just come from the Harvard Observatory of the discovery of 14 new variable stars. These discoveries were made on examination of the Henry Draper memorial photograps of stellar spectra taken by Mrs. Fleming During last November an announcement of six new variables was made, and in last July of seven...