A short course in astronomy and the use of the globes (1871)
Kiddle, Henry, 1824-1891 · New York, Chicago, Ivison, Blakeman, Taylor & co. · leaf 41
erver stands at an eleva-tion above the surface of the earth, the sensible horizonsinks below the rational horizon, and more than one-halfof the heavens becomes visible. This is called the Dipof the Horizon. 44. What is the celestial sphere ? What is the principal circle of this sphere ?How may it… … 88 THE CELESTIAL SPHERE. This will be understood by studying the following diagram ancexplanation: Let the small circle, whose centre is E, represent the earth, the portion of the larg(circle V Z V a part of the celestial sphere, and P the j>ointor place, of the spectator. Therthe tangent S P S…
Astronomy
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