Astronomy in a nutshell, the chief facts and principles explained in popular language for the general reader and for schools (1912)
Serviss, Garrett Putman, 1851-1929, Rouben Mamoulian Collection (Library of Congress) DLC · New York, London, G.P. Putnam's sons · leaf 80
circles.It passes alike through the celestial polesand the poles of the ecliptic. It will alsobe observed that the vernal equinox is com-mon to the two systems of co-ordinates, be-cause it lies at one of the intersections of theecliptic and the equator. In passing from onesystem to the other, the… … Na Fig. 4. The Ecliptic and Celestial Latitude and Longitude. C, as in the other figures, is the place of the observer andZ is the zenith, but to avoid complication of details thecircle of the horizon is not drawn, only the north-and-south line, N C S, being shown.Eq Eq is the equator.Ec Ec is the…
Astronomy
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