The geography of the heavens, and class-book of astronomy: (1858)
Burritt, Elijah H. (Elijah Hinsdale), 1794-1838, Mattison, Hiram, 1811-1868 · New York, Mason brothers · leaf 301
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 onterrestrial objects ? C46. 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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