Newton's principia, first book sections I, II, III, with notes and illustrations and a collection of problems, principally intended as examples of Newton's methods (1900)
, womay, in what follows, employ the equable descriptionof areas as a guide to the centre, about which allcurvilinear motion in free space takes place, Illuslralion. 166. As an Illustration of the last propositions and theircorollaries, we may state some of the observed facts in themotion of the… … S (1) The areas described by the radii drawn from the Moonto the Earth are nearly proportional to the times of describing;hence the resultant force on the Moon tends nearly to E. (2) If E8 the line joining the centres of the Earth and Sunmeet the Moons relative orbit about the Earth in A^ 0, andDEB…
Mechanics · Celestial mechanics
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