Moulton, Forest Ray, 1872-1952 · New York, The Macmillan company · leaf 161
o the horizonat B. The altitude is BA and the azimuth is SWNB.These distanqes can be computed by spherical trigonometry,but they may be estimated closely enough for presentpurposes. In this problem the altitude is about 12° and theazimuth is about 230°. Whatever the data may be whichare supplied by… … Fig. 51. —Application of the declina-tion in finding the position of a star. CH. IV, 71] REFERENCE POINTS AND LlNES 133 have been explained in Art. 69, an actual problem will besolved. Suppose the observer is in latitude 40° north. Thealtitude of the pole P, Fig. 52, as seen from his position,…
Astronomy
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