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 101
ust beconical in shape (since the bodies casting them are approxi-mately spheres), with bases equal to the cross-sections of thebodies intercepting the Suns light, and lengths dependingupon the sizes and distances of these bodies from the Sun.Every night we walk in the Earths shadow, and, from… … Fig. 5. Shadow and Penumbra of Earth and Moon. A marks the position of the Moon in a solar eclipse,B, in a lunar eclipse. An eclipse is total for points inthe shadow cones, partial for points within the penum-brae. A beautiful example of such a shadow is that afforded bythe passage of one of…
Astronomy
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
