PLANETARY MOTION. 169 (164.) Now let us suppose that a planet is rather carelessly chap, ii.launched into space, with a velocity neither at right angles tothe sun, nor of sufficient amount to maintain it in a circle, atthat distance from the sun. Fig. 32. … will find theirorbits, what-ever be thedirection andforce of theiroriginal mo-tion. Let P (Fig. 32) represent theposition of the planet, a theamount and direction of its hap-hazard velocity during the firstunit of time. The direction ofthe motion being within a rightangle to S P, the action of…
Astronomy
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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-400-277.webp)
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