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History of physical astronomy, from the earliest ages to the middle of the 19th century. Comprehending a detailed account of the establishment of the theory of gravitation by Newton, and its development by his successors; with an exposition of the progress of research on all the other subjects of celestial physics (1852)

Grant, Robert, 1814-1892 · London, R. Baldwin · leaf 619

An illustration from History of physical astronomy, from the earliest ages to the middle of the 19th century. Comprehending a detailed account of the establishment of the theory of gravitation by Newton, and its development by his successors; with an exposition of the progress of research on all the other subjects of celestial physics, 1852, leaf 619
ies. Now inthose cases of the solar system where-in the mean motion of one revolvingbody is almost exactly double the meanmotion of the other, the effects producedby the mutual perturbation of the twobodies are sensible only near conjunc-tion. Let us suppose that in one ofsuch cases the disturbing… … APPENDIX. 595 ing force of the exterior body will then be resolvable into two distinct forces,one of which acts in the direction of the radius vector, and tlie other in the di-rection of a tangent to the orbit. The former of these forces acts outwardsthroughout the whole of the arc bag, and…

Astronomy

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