Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 83
above hishorizon (NWS) = 40° ; it is measured by the declination of his zenith(Z) = 40°. — Define the latitude of an observer on the Earth according toGeography. Define the latitude of an observer on the Earth ac-cording to Astronomy in three ways : I. The altitude of the NorthPole above the… … Fig. 36. So far we have only spoken of observers in the northernhemisphere of the Earth. The northern hemisphere isthe most important to us, because all the more intelligentnations of the globe lived in it for centuries and all astron-omy was perfected there. Later on, our definitions willbe…
Astronomy
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