Chalub, Fábio Augusto da Costa Carvalho2017-10-302017-10-302009-030102-4744PURE: 488815PURE UUID: e7cbf7ca-c4ce-4f0a-b4ea-7031b55741e3researchoutputwizard: 14522WOS: 000268026200003Scopus: 69349092357http://hdl.handle.net/10362/24765This work was supported by FCT/Portugal. I also would like to thank M. Souza for a careful revision of the manuscript. Copyright by the Sociedade Brasileira de FísicaThe Saros cycle has been known since antiquity and refers to the periodicity of eclipses. It is the least common multiple of three periods: the synodic, the draconic, and the anomalistic months. We show how to obtain these periods from Newton's laws with a precision greater than 0.02% using only the sidereal month and year as references.203099englaws3-bodyproblemrestrictedSarosNewton'scycleseclipsesprecessioneclipsesNewton's lawsRestricted 3-body problemSaros cyclesjournal article10.1590/S1806-11172009000100003