Monthly Notices of the Royal Astronomical Society, Volume 68; Volumes 1907-1908Priestley and Weale, 1908 Includes lists of additions to the society's library, usually separately paged. |
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Page 70
... obtained without any telescope whatever to form an * When the focal length of the collimator is limited ( as is ... obtain , since the aperture of the spectroscope can be increased by merely increasing the focal length of the collimator ...
... obtained without any telescope whatever to form an * When the focal length of the collimator is limited ( as is ... obtain , since the aperture of the spectroscope can be increased by merely increasing the focal length of the collimator ...
Page 73
... the spectrum , if fortunately obtained , may be much more valuable than the results of a few visual ob servations made hastily . I now wish to speak rather more particularly of another Nov. 1907 . 73 Work with Inexpensive Apparatus .
... the spectrum , if fortunately obtained , may be much more valuable than the results of a few visual ob servations made hastily . I now wish to speak rather more particularly of another Nov. 1907 . 73 Work with Inexpensive Apparatus .
Page 76
... obtained . The next slide shows some photographs taken with the per- manent instrument . Such photographs as these , made with the calcium and hydrogen lines , open up for investigation a large field , which anyone can euter with just ...
... obtained . The next slide shows some photographs taken with the per- manent instrument . Such photographs as these , made with the calcium and hydrogen lines , open up for investigation a large field , which anyone can euter with just ...
Page 77
... obtained with a spectroheliograph . I see that I must rapidly draw to a close . I might mention various other methods of employing spectroheliographs , and if anyone present should be interested at some future time to take them up I ...
... obtained with a spectroheliograph . I see that I must rapidly draw to a close . I might mention various other methods of employing spectroheliographs , and if anyone present should be interested at some future time to take them up I ...
Page 80
... obtained . And so I might go on pointing out opportunities of various kinds , but I should tire you if I ventured to do so . We must not forget , however , that the possibility always exists of getting some entirely new method that will ...
... obtained . And so I might go on pointing out opportunities of various kinds , but I should tire you if I ventured to do so . We must not forget , however , that the possibility always exists of getting some entirely new method that will ...
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Common terms and phrases
angle appear Astrographic axis bright brighter Cape Catalogue centre coefficient colour column comet comparison stars computed corrections correlation curve cyanogen David Gill deduced determination distance Double Stars drift E. E. Barnard Earth eclipse epoch equation equatorial faint formula give given Greenwich groups heliometer instrument Julian Day Jupiter latitude lens Lick Observatory limb lines longitude magnitude Max Wolf mean measures meridian method Monthly Notices Moon nebula nucleus number of stars observations obtained orbit outer condensation paper parallax Paris perihelion perihelion passage period perturbations photographs planet plates position present Professor proper motion reduced reflector refraction refractor region right ascension ring Royal Observatory satellite Saturn seen Sept solar spectra spectral class spectroheliograph spectroscope spectrum spot stellar sun-spot Sun's surface Table telescope tion variable Yerkes Observatory zone ΙΟ