On Feynman’s analysis of the geometry of Keplerian orbits
@article{Kowen2003OnFA,
title={On Feynman’s analysis of the geometry of Keplerian orbits},
author={Michael Kowen and H. Mathur},
journal={American Journal of Physics},
year={2003},
volume={71},
pages={397-401}
}A geometrical construction, introduced by Maxwell and Feynman to demonstrate that closed Keplerian orbits are elliptical, is adapted to show that open Keplerian orbits are hyperbolic or parabolic.
