The geography of the heavens, and class-book of astronomy: accompanied by a celestial atlas (1873)
Burritt, Elijah H. (Elijah Hinsdale), 1794-1838, Mattison, Hiram, 1811-1868, ed, Whitall, Henry, 1819-1887? Celestial planisphere · New York, Sheldon & company · leaf 307
t con-cave of the heavens. Now,as the light passes fromthe stars, and strikes theatmosphere, it is seen toeurve 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… … W4 What other effects of refraction? 645. Atmospherical refraction? Effects 09terrestrial objects ? 146. Upon apparent plaices of stars, 4c. ? REFRACTION AND TWILIGHT. 301 Hon wholly ceases. The dark lines in the cut sjow the true, and the dotted the apparentposition*. In the cut, the depth of the…
Constellations · Stars
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