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 269
es equal areas in \\ equal times. The radius is an imaginary \ lino joining the center of the Sim and \ the center of the planet, in any part of \ / its orbit. Vector is from reJio, to carry ; \ b ^/ hence the radius vector is a radius carried **•—i—- round. By the statement that it describes equal… … The nearer a planet is to the Sun. the more rapid itsmotion. It follows, therefore, that if the orbit, of aplanet is an ellipse, with the Sun in one of the foci, itsrate of motion will be unequal in different parts of itsOrbit—swiftest at perihelion, and slowest at aphelion.From perihelion to…
Constellations · Stars
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