@ARTICLE {, title = {Keplerova úloha - algebraické riešenie}, author = {Demetrian, Michal}, journal = {Obzory matematiky, fyziky a informatiky}, year = {2009}, volume = {38}, number = {1}, pages = {42--50}, issn = {1335-4981}, abstract = {We present the algebraic solution to the Kepler problem - i.e. we show how to find all the possible trajectories of a testing body in the Newtonian gravitational field of a massive central body - without any need of integrating an equation of motion (differential equation). The presented idea is rather well-known on the scientific level, however, almost absolutely unknown in pedagogical level in spite of the fact it offers a nice possibility to explain the Keplerian elipses to the secondary school students.}, }