Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt · leaf 38
on is equal to the altitudeof the pole above the horizon. As a result of this apparent motion, each individualconstellation changes its configuration with respect to thehorizon, that part which is highest when the constellationis above the pole being lowest when below it. This isshown in Fig. 7,… … NORTH Fig. 7. If the polar distance of the star exceeds the altitude ofthe pole, it will dip below the horizon during a part ofits diurnal course, and will be longer below it the greaterits polar distance A star whose polar distance is 90° lies on the celestialequator, and one half its diurnal…
Astronomy
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