Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 72
horizonor to the north-polar-distance of the north point of thehorizon. When a photographic camera is directed to the northpole of the heavens at night and an exposure of about 12hours is given the developed plate will look like Fig. 29. DIURNAL MOTION: SUN, MOON. AND STARS. 51 The plate has… … Fig. 29. From a photograph of the motion of the stars near the north pole of theheavens. The exposure-time was 12 hours. The bright trail nearest thepole was made by Polaris. the same. It is the north celestial pole. If the camerahad been directed to the equator the trails of the starspassing…
Astronomy
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