Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 49
lled the plane ofFig. IO.-Hu.f of the Ce- the horizon (pronounced hor-i-lestial Sphere, Studded Zon). Its bounding circle is thewith Stars. .circle of the horizon. A point The sphere seems to rest on the . * plane of the horizon. The horizon on the celestial sphere directly seems to he hounded by… … SPACE—THE CELESTIAL SPHERE—DEFINITIONS. 29 zenith. A line joining the observer and the zenith-pointis perpendicular to the plane of the horizon. If you wishto describe the situation of a star you can say that itszenith-distance is so many degrees—50° for example. Thestar S in the figure is distant…
Astronomy
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