The elements of astronomy, physical and geometrical (1715)
Gregory, David, 1659-1708, Halley, Edmond, 1656-1742. Synopsis of the astronomy of comets, Adams, John, 1735-1826, former owner. BRL, Boston Public Library (John Adams Library) BRL · London : Printed for J. Nicholson ... and sold by J. Morphew ... · leaf 119
the other Focus F, go farther oS in infinitum^the Body P will be kept in the Perimeter of theFigure TP, by the Centripeaal Force tendingto Sy after the fame manner as it was before,and by the fame Law. But in this cafe, the El-lipfe will be turnd into a Parabola : The Law-therefore of a Centripetal… … Book I. ^/AstRONoMY. 83 COROLLART^^ If, all the reft continuing as before, the FocusF^ [F/f. ^6.] go off to a more than infiniteDiftance; (that is, if it appear on the other fideof T, and make the Vertices A and T lie be-tween the Foci S and F; whereas before, theFoci 5 and F were between the…
Astronomy
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