
« Parabolic throw  Sitemap  Poisson » Planetary motionKepler discovered his three laws of planetary motion after a titanic analysis of years of astronomical observations by Tycho Brahe.
where M is the combined mass of the Sun and the planet and G is the universal gravitational constant. The xycoordinates for the massless test particle are the relative position of the planet with respect to the Sun in this twobody approximation of the solar system.
Click on the image to start the applet. Applet Planetary Motion.
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