Smith, Hamilton Lanphere, 1819-1903. [from old catalog] · Cleveland, M. C. Younglove and company · leaf 30
once around the heavens in 24 hours. To account for the irregu-lar motions of the planets before noticed, a modification of this … system was necessary. Thus BAC may represent the orbit of 28 THE WORLD. Mercury around the earth, the planet however, instead of revolvingin this circle, was supposed to be revolving in another smallercircle c a b d9 whose centre v was carried forward as the circle AB C revolved around the earth,…
Astronomy · Meteorology · Geology · Paleontology
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![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-255-160.webp)
