 | Voltaire - English literature - 1909 - 346 pages
...regarde le corps attiré, et Newton le corps qui attire. « And by comparing the periodsof theseveral planets with their distances from the sun, he found that if any ponver like gravity held them in their courses, ils strenghth must decrease in the duplicate proportion... | |
 | Alfred Rupert Hall, Isaac Newton - Biography & Autobiography - 1999 - 236 pages
...by the force of gravity, no Joubt the primary planets are carried round the sun by the like power: and, by comparing the periods of the several planets...found, that if any power like gravity held them in thcir courses, it's strength must decrease in the duplicate proportion [ie as the square] of the increase... | |
 | Carlos I. Calle - Science - 2001 - 682 pages
...by the force of gravity, no doubt the primary planets are carried round Hie Sun by the like power. And by comparing the periods of the several planets...duplicate proportion of the increase of distance. Newton himself mentions in a memorandum of about 1714 that he "began to think of gravity extending... | |
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To make an estimate what might be the degree of this diminution, he considered with himself that, if the moon be retained in her orbit by the force of gravity, no doubt the primary planets are carried round the sun by the like power. And, by comparing... 
