Brennan, Martin Stanislaus, 1845-1927 · New York : The Catholic publication society co. · leaf 218
o govern Hisworld animated him to constantly fresh endeavors to Celestial Laws. 209 discover these laws, until he achieved one of the mostglorious triumphs in the history of Astronomy. Kepler first chose a circle for the hypothetical pathof the planets, but soon discovered that he could… … Fig. 12.—Describing an Ellipse. The Ellipse.—An Ellipse is a conic section formed bycutting a right cone with a plane oblique to its sides.The characteristic feature of the curve is, that the sumof the distances of any point in it from two fixed pointswithin is constant. The two fixed points are…
Astronomy
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