orbit, the real velocity, at the extremity of the shorter axis,will be just sufficient to maintain the planet in a circular orbit, atthat mean distance from-the sun* * Let S be the sun, and P the position of a planet as repre-sented in the annexed figure, and we may now suppose it tothe asteroids… … As action is just equal to reaction, under all circumstances, therefore the bursting of a planet can give the whole mass no additional velocity ; a small mass may be blown off at a great velocity, but there will be an equal reaction on other masses, On the «n ^e 0pp0Site direction. bursting of a L…
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-149-83.webp)
