Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 126
an observer travelling completely round the Earth tothe eastwards—towards sunrise—gains a day ; and why an observertravelling completely round the Earth westwards away from sunriseloses a day. 17. Methods of Determining the Latitude of aPlace ok the Earth. Latitude from CircumpolarStars.—In the… … Fig. 54. The latitude of a place on the earth can be determined by measuringthe zenith distances of a circumpolar star at its two culminations. the pole in its apparent diurnal orbit. PS — PS in thestars north-polar-distance, and PH = <p = the latitudeof the observer. 106 ASTRONOMY. Therefore…
Astronomy
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