TY - JOUR AU - Cariñena Marzo, José Fernando AU - Fernández-Rañada Menéndez De Luarca, Manuel AU - Santander Navarro, Mariano PY - 2016 SN - 1361-6404 UR - http://uvadoc.uva.es/handle/10324/22871 AB - Hodographs for the Kepler problem are circles. This fact, known for almost two centuries, still provides the simplest path to derive the Kepler first law. Through Feynman's 'lost lecture', this derivation has now reached a wider audience. Here we look... LA - eng PB - IOP Publishing TI - A new look at the Feynman ‘hodograph’ approach to the Kepler first law DO - 10.1088/0143-0807/37/2/025004 ER -