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 66
gle be-tween the direction of theobservers plumb-line andthe plane of the earthsequator; and this is thesame as the altitude ofthe pole, as will be clearfrom Tig. 6. Here theangle ONQ is the lati-tude as defined. If nowat 0 we draw HH per-pendicular to OZ, it willbe a level line, and will point to… … Fig. 6. - ■Relation of Latitude to the Elevationof the Pole. 56 MEASURING THE LATITUDE. [§ 80 celestial pole. The angle HOP is therefore the altitude ofthe pole, as seen at 0, and it obviously equals ONQ; and thisis true whether the earth be a sphere, or whatever its form.This fundamental relation,…
Astronomy
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