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The Adolfo Stahl lectures in astronomy, delivered in San Francisco, California, in 1916-17 and 1917-18, under the auspices of the Astronomical Society of the Pacific (1919)

Astronomical Society of the Pacific, Aitken, Robert Grant, 1864-1951 · San Francisco Stanford University Press · leaf 350

An illustration from The Adolfo Stahl lectures in astronomy, delivered in San Francisco, California, in 1916-17 and 1917-18, under the auspices of the Astronomical Society of the Pacific, 1919, leaf 350
h of one foot at adistance of 400 miles subtends the same angle. The value of the standard dis-tance commonly used, in light-years, is 33. The Brightness of the Stars 231 spectrum, at least for all but the bluest spectral types. Therelative intensities of certain pairs of lines, even in spectra… … Fig. 19. Vertical Distances Represent Numbers of Stars HavingTHE Absolute Magnitudes Given at the Top of the Diagram,dififerent spectral classes being shown separately. The grouping ofthe stars as giants and dwarfs is clearly indicated, the former havingan absolute magnitude of about +1, while the…

Astronomy

Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.

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