Young, Charles A. (Charles Augustus), 1834-1908, Young, Anne Sewell, b. 1871., ed · Boston, New York [etc.] Ginn and Company · leaf 108
rallaxof a body at the horizon — the horizontal parallax — issimply the angular semi-diame-ter of the earth as seen from thebody. When we say that the moons horizontal parallax is 57, it is equivalent to saying that seen from the moon the earth appears to have a diameter of 114. 148. Relation… … Diurnal Parallax. r -*( 206265/ in which r is the earths radius, R the distance of the body,and s the apparent semi-diameter of the earth (in seconds ofarc) as seen from the body; i.e., s = the bodys horizontalparallax If, as is usual, we write p instead of s for thehorizontal parallax of the body,…
Astronomy · Constellations
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