Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 247
pens that the Moon passes through the penumbraof the Earths shadow without touching the shadow at all. Thediminution of light in such cases is scarcely perceptible unless theMoon at least grazes the edge of the shadow. Eclipses of the Sun.—The shadow of the Earth fallingupon the Moon cuts off the… … Fig. 143.—Dimensions of the Shadow of the Moon. In this figure let 8 represent the Sun, as before, and letE represent the Moon. The cone B VB is now the umbraof the Moons shadow. We wish to know the length ofthe Moons shadow VE. By a method similar to thatgiven on page 224, using accurate values of…
Astronomy
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