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 274
twelvetriangles, numbered 1, 2, 3, &c, over each of which th<* radius vector sweeps in equaltimes, are equal. 568. The third law of Kepler is, that the squares of the periodictimes of any two planets are proportioned to the cubes of their meandistances from the Sun. Take, for example, the… … 667. State the $eoond law of Kepler? Explain It?Btai (ration .* Tte third aw? Whi* B-G. 12 268 ASTRONOMY. According to these laws, which are known to prevail throughout the solar syotont.many of the facts of astronomy are deduced from other facts previously ascertained,They are, therefore, of great…
Constellations · Stars
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
