 But, in the midst of all these vicissitudes, the length of the major axes and the mean motions of the planets remain permanently independent of secular changes. They are so connected by Kepler's law, of the squares of the periodic times being proportional...  Mechanism of the Heavens - Page xivby Mary Somerville - 1831 - 621 pagesFull view - About this book
 | Scott Buchanan - 1962 - 168 pages
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 | 1965 - 886 pages
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...problem which preoccupied his thoughts for over twenty years. In the terminology of his day it states: the cubes of the mean distances of the planets from the Sun, divided by the squares of the periods of revolution, are equal for all the planets. The experiments... | |
 | Mary Somerville - 1846 - 504 pages
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