The geography of the heavens and classbook of astronomy; (1863)
Burritt, Elijah H. (Elijah Hinsdale), 1794-1838, Mattison, Hiram, 1811-1868, Whitall, Henry, 1819-1887? Celestial planisphere. [from old catalog] · New York, Mason brothers; Boston, Mason & Hamlin; [etc., etc.] · leaf 307
m the object. The true place of a celestial body is that point of the heavensin which it would be seen by an eye placed at the center of theEarth. The apparent place is that point of the heavens wherethe body is seen from the surface of the Earth. The parallax 657. Dr. Youngs opinion? What remark… … AURORA BOREAL1S AND PARALLAX. 305 of a heavenly body is greatest when in the horizon, and isthence called the horizontal parallax. Parallax decreases as thebody ascends towards the zenith, at which place it is nothing. The adjoining cut will afford a sufficient illustration.When the observer,…
Constellations · Stars
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