 | Hugo Reid - 1850 - عدد الصفحات: 156
...radius vector], passes over areas proportional to the times of the motions ; — that is, describes equal areas in equal times. 2. The orbits of the planets are ELLIPSES, having the sun in one of the foci. 3. The squares of the periodic times of the planets are in the same... | |
 | Alexander Stewart - 1864 - عدد الصفحات: 684
...radius vector), passes over areas proportional to the times of the motions ; — that is, describes equal areas in equal times. 2. The orbits of the planets are ELLIPSES, baring the sun in one of the foci. 3. The squares of the periodic times of the planets are in the same... | |
 | Roger R. Bate, Donald D. Mueller, Jerry E. White - 1971 - عدد الصفحات: 484
...First Law-The orbit of each planet is an ellipse, with the sun at a focus. Second Law-The line joining the planet to the sun sweeps out equal areas in equal times. Third Law— The square of the period of a planet is proportional to the cube of its mean distance... | |
 | Leroy W. Dubeck, Suzanne E. Moshier, Judith E. Boss - 1994 - عدد الصفحات: 348
...planetary motion states that: The speed of each planet varies in such a way that an imaginary line joining the planet to the Sun sweeps out equal areas in equal times. Kepler's Third Law of planetary motion states that: The cubes of the semimajor axes of the elliptical... | |
 | mary Gray - 1997 - عدد الصفحات: 1094
...around the sun in an elliptical orbit having the sun at one of its two foci, and that a line joining the planet to the sun sweeps out equal areas in equal times as the planet moves along its orbit. Chapter 4 Alternate Methods for Plotting Plane Curves (a) (b)... | |
 | James Nickel - 1999 - عدد الصفحات: 140
...two foci. > A planet changes its speed according to its distance from the Sun, and the line joining the planet to the Sun sweeps out equal areas in equal times. In the figure, the time that it takes for a planet to travel from one point to the next is the same... | |
 | Roberto Torretti - 1999 - عدد الصفحات: 532
...There are as many orbits to a planet as it has revolutions, as in the II The straight line joining the planet to the sun sweeps out equal areas in equal times (area law). Ill For each planet, the square of the time of revolution is proportional to the cube of... | |
 | J. L. Heilbron, Professor of the History of Science John L Heilbron - 2009 - عدد الصفحات: 376
..."laws," planets move in elliptical orbits around the sun at one focus in such a way that the line joining the planet to the sun sweeps out equal areas in equal times. This complicated rule of motion is illustrated in Figure 3.14, where the curvilinear areas PiEFI and... | |
 | D.A. Vallado - 2001 - عدد الصفحات: 1002
...important: 1 . The orbit of each planet is an ellipse with the Sun at one focus. 2. The line joining the planet to the Sun sweeps out equal areas in equal times. 3. The square of the period of a planet is proportional to the cube of its mean distance to the Sun.... | |
 | Charles D. Brown - 2002 - عدد الصفحات: 632
...Law: The orbit of each planet is an ellipse, with the sun at one focus. Second Law: The line joining the planet to the sun sweeps out equal areas in equal times. Third Law: The square of the period of a planetary orbit is proportional to the cube of its mean radius.... | |
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The line joining the planet to the sun sweeps out equal areas in equal times. 
