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 107
the more remote the body, the smallerits parallax. Since the radius of the earth varies slightly in different lati-tudes, we take the equatorial radius as a standard, and theequatorial horizontal parallax is the earths equatorial semi-diameter as seen from the body. It is this which is usuallymeant… … Fig. 17. — Diurnal Parallax. § 141] DIAMETER, ETC., OF THE MOON. 97 141. Parallax, Distance, and Velocity of the Moon. — The moons equatorial horizontal parallax found by correspondingobservations made at different parts of the earth, is 3422 (572) according to Neison, but varies considerably on…
Astronomy
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