History of the planetary systems from Thales to Kepler (1906)
Dreyer, J. L. E. (John Louis Emil), 1852-1926 · Cambridge University Press · leaf 395
1587, 1591, 1593, and 1595 and deduced from themthe time of true opposition. In the figure D, G, F, E arethe four observed places of Mars, S the sun, C the centre of the circular orbit, A thepunctum cequans, HI the lineof apsides. The position ofthis line and the mean anom-aly of the first… … 1 Caps. xiii.-xiv. Op. in. pp. 228-234. 384 Kepler [ch. and SG, while the angles at A, the differences of mean anomaly,were known, as the period of sidereal revolution gave the meanmotion. From the triangles ASF, ASE, ASD and ASG, inwhich the angles at AS are known, the distance SF, SE, SDand SG…
Astronomy -- History · Solar system
Internet Archive · Gerstein Library, University of Toronto · 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-397-275.webp)