Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 50
nith Z by an arcZS. Its zenith-distance is 50°. The arc from the zenithto the horizon is 90°. That is, the zenith-distance of thehorizon is everywhere 90°. The altitude of a star is itsangular distance above the horizon. The altitude of thestar 8 in the figure is HS = 40°. The zenith-distance and… … Fig. 11.—The Earths Axis and the Plane op itsEquator EQ. NP is the earths north pole; SP is the south pole; eg is the earth1equator; EQ is the plane of the celestial equator. 30 ASTBONOMY. The Celestial Equator.—In the figure there is a pic-ture of the Earth. NP is its north pole, SP is its…
Astronomy
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