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Books Books 31 - 40 of 123 on The third, viz. that the squares of the periodic times are proportional to the cubes....
" The third, viz. that the squares of the periodic times are proportional to the cubes of the mean distances... "
History of Astronomy - Page 53
by George Forbes - 1909 - 200 pages
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The English Cyclopaedia

Encyclopedias and dictionaries - 1867
...in ellipses, that the radius vector in each orbit passes over areas proportional to the tunes, and that the squares of the periodic times are proportional to the cubes of the mean distances, — are commonly called Kepler's laws. They were discovered by Kepler from observation, before the...
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Popular Astronomy: A Series of Lectures

George Biddell Airy - Astronomy - 1866 - 292 pages
...South Pole of the earth. From the relation of the motions of different planets expressed in Kepler's third law (that the squares of the periodic times are proportional to the cubes of the distances), it follows that the periodic times increase in a greater proportion than the distances...
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Arts and Sciences: Or, Fourth Division of "The English Encyclopedia", Volume 4

Charles Knight - Encyclopedias and dictionaries - 1867
...in ellipses, that the radius vector in each orbit passes over areas proportional to the times, and that the squares of the periodic times are proportional to the cubes of the mean distances, — are commonly called Kepler's laws. They were discovered by Kepler from observation, before the...
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Mechanics for Beginners with Numerous Examples

Isaac Todhunter - Mechanics - 1867 - 350 pages
...The radius drawn from a planet to the sun describes in any time an area proportional to the time. (3) The squares of the periodic times are proportional to the cubes of the major axes of the orbits. From the second law it follows, by Art. 159, that each planet is acted on...
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Mechanics for Beginners with Numerous Examples

Isaac Todhunter - Mechanics - 1867 - 350 pages
...The radius drawn from a planet to the sun describes in any time an area proportional to the time. (3) The squares of the periodic times are proportional to the cubes of the major axes of the orbits. From the second law it follows, by Art. 159, that each planet is acted on...
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Chambers's Miscellany of Instructive & Entertaining Tracts, Volumes 15-16

William Chambers, Robert Chambers - Anthologies - 1869
...formed his second law. His third great discovery was, that the squares of the periodic times of planets are proportional to the cubes of the mean distances from the sun. The sagacity of this wonderful man, and his incessant application to the study of the planetary motions,...
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Chambers's miscellany of instructive & entertaining tracts, Volume 15

Chambers W. and R., ltd - 1871
...formed his second law. His third great discovery was, that the squares of the periodic times of planets are proportional to the cubes of the mean distances from the sun. The sagacity of this wonderful man, and his incessant application to the study of the planetary motions,...
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History of the Conflict Between Religion and Science

John William Draper - Religion and science - 1875 - 373 pages
...relation between the mean distances of the planets from the sun and the times of their revolutions ; " the squares of the periodic times are proportional to the cubes of the distances." -In "An Epitome of the Copernican System," published in 1618, he announced this law, and...
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The Quarterly journal of the Poona sarvajanik sabha, ed. by S.H ..., Volume 1

Poona Sarvajanick sabha
...beautiful law of Kepler, though it is not based on any theory and is derivde from actual observation, viz that " The squares of the periodic times are proportional to the cubes of the distances from the sun." To us it appears that all the arguments of the Docter turn upon one point,...
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Elements of Astronomy

Robert Stawell Ball - Astronomy - 1880 - 459 pages
...which the sun occupies one of the foci; each of the planets sweeps over equal areas in equal times, and the squares of the periodic times are proportional to the cubes of the mean distances. In order to define completely the nature of the orbit of a planet, it is necessary to specify certain...
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