Lessons in astronomy including uranography. A brief intoductory course without mathematics (1896)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston, London, Ginn and company · leaf 93
ich he supposed thesun to describe around it with uniform velocity. Obviously the suns apparent motion is not uniform, becauseit takes 186 days for the sun to pass from the vernal equinox, 1 Hipparchus (and every one else until the time of Kepler, 1607)assumed on metaphysical grounds that the suns… … 82 LAW OF THE EARTHS MOTION. [§ 120 March 20th, to the autumnal, Sept. 22d and only 179 days toreturn. Hipparchus explained this on the hypothesis that theearth is out of the centre of the circle. 121. The Law of the Earths Motion.—By combining themeasured apparent diameter of the sun with the…
Astronomy
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