Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 285
it lay in the ecliptic, she would 264 ASTRONOMY. be projected on the Suns disk at every inferior conjunc-tion. The inclination of her orbit is, in fact, about 3£°,and thus transits of Venus occur only when she is near thenode of her orbit at the time of inferior conjunction. InFig. 159 let E, V, S… … Fro. 159.—Determination of the Distance of the Sun. Similar phenomena will occur for A at 1, 2, 3, 4. WhenA sees Venus at a, B will see her at b. ab : AB :: Va : VA;but VA : Va as 1 : 2-J nearly, ab therefore occupies onthe Suns disk a space 2-j- times as large as the Earthsdiameter. If we measure…
Astronomy
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