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 203
ccentricity of theEarths orbit is about one and a half millions of miles; hence she is 3,000,000 of milefcnearer the Sun in her perihelion, than in her aphelion. Now as the Sun remains fixed in the lower focus of the Earths orbit, it is easy to per-ceive that a line, passing centrally through the… … 398. What is the true form of the planets orbits ? Why if. equinoctial time irregular?899. How is the Earths orbit divided by the equinoctial? 202 ASTRONOMY. Sun, or north of the equinoctial, contains about 184 degrees ,while that portion of it which lies below the Sun, or south of theequinoctial,…
Constellations · Stars
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![An illustration from Nicolai Copernici Torinensis De reuolutionibus orbium coelestium, libri VI : Habes in hoc opere iam recens nato, & aedito, studiose lector, motus stellarum, tam fixarum, quàm erraticarum, cum ex ueteribus, tum etiam ex recentibus obseruationibus restitutos: & nouis insuper ac admirabilibus hypothesibus ornatos. Habes etiam tabulas expeditissimas, ex quibus eosdem ad quoduis tempus quàm facillime caculare poteris. Igitur eme, lege, fruere. [Line in Greek] (1543)](https://img.insideoutlibrary.com/img/200/ia-nicolaicopernici00cope-329-220.webp)
