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 69
Fig. 1—Donatis comet, 1858, Oct. 5 ; head and beginning of tail; brilliantstellar nucleus near center of head; envelopes surrounding nucleuson side toward the Sun. White circle to the left represents com-parative size of the Earth. … Fig. 2—Holmess comet of 1892; no tail was visible in the telescope; long-exposure photographs (Barnard, 3 hours, Nov. 10, 1892) recordedan extremely faint tail extending down to lower right corner of thepicture. The great spiral nebula in Andromeda was recorded onthe photograph—upper left corner of…
Astronomy
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
