Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
moon toa point at the surface of the earth, the sun would require to fill thespace between the points of the two long dotted arrows. ASTRONOMY. 461 At P tlie conditions are reversed. The earth is at her perihelion, ornearest position to the sun, consequently the shadows of the earth andmoon Avill… … centrally over the disk of the sun, her shadow will not be sufficientlylong, by 20,000 miles, to reach the earth, and so cover his whole diskor face, but will leave a ring, apparently around herself, unobscured, asshown by the appearance of the sun in the figure. The eccentricity of the earths…
Physics · Astronomy
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