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Kepler’s Laws of Planetary Motion in Motion

Kepler_laws_diagram

Kepler's Laws of Planetary Motion





Illustration of Kepler’s three laws with two planetary orbits. (1) The orbits are ellipses, with focal points ƒ1 and ƒ2 for the first planet and ƒ1 and ƒ3 for the second planet. The Sun is placed in focal point ƒ1. (2) The two shaded sectors A1 and A2 have the same surface area and the time for planet 1 to cover segment A1 is equal to the time to cover segment A2. (3) The total orbit times for planet 1 and planet 2 have a ratio a13/2 : a23/2.

Image Courtesy, Hankwang.

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