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
ebright enough for the unassisted eye to see the head, andperhaps one in eight or ten for the unassisted eye to see thetail. Computed comet orbits have become increasingly accu-rate, partly because of greater telescopes, which enable thesebodies to be more accurately observed and observed… … 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.
Astronomy
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
