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 30
s as far from the Sun as the Earth, its diameteris four times the Earths, and, traveling four miles per second,it requires eighty-four years to complete the circuit of theSun. It has four known satellites. The discovery of the next planet, Neptune, was, as youknow, a great event in the history of…
Astronomy
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
