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 302
t con-cave of the heavens. Now,as the light passes fromthe stars, and strikes theatmosphere, it is seen tocurve downward, becauseit strikes the atmosphereobliquely ; and the air in-creases in density as weapproach the Earth. Butas the amount of refraction depends not only upon the density, but also… … 644. What other effects of refraction? 645. Atmospherical refraction? Effects enterrestrial objects ? 146. Upon apparent places of stars, &c. ? REFRACTION AND TWILIGHT. 301 tion wholly ceases. The dark lines in the cut show the true, and the dotted the apparentpositions. In the cut, the depth…
Constellations · Stars
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