Padmanabhan, T.2012-03-032012-03-032009-12-12http://hdl.handle.net/11007/210The major contribution of Kepler was in discovering his laws of planetary motion, one of which states that planets move in elliptical orbits around the Sun which is located at one of the foci of the ellipse. The motion of a test particle in an inverse square force law is used called the Kepler problem. We will examine several aspects of this motion in this last installment of Snippets in Physics.enKepler problemCoulomb fieldPrecessionGeneral relativityArticle