A Review of the Dynamics of Classical Triple Stars

Four ways of studying the dynamics of triple systems are outlined, namely the analytical, the qualitative, the numerical, and the observational approach. A discussion of the stability of classical (revolutional, hierarchical) triples summarizes the results of analytical developments, based on the application of von Zeipel’s method to the general three-body problem, and of numerical experimentation. Finally, a summary is given of recent investigations concerning the dynamics of triples other than the revolutional systems.

Effects of a constant force on a Keplerian orbit

The paper investigates the effects of a constant force on a Keplerian orbit, with the aid of von Zeipel's method in Delaunay variables. There follows an application to the effect of the pressure of solar radiation on the orbit of an artificial satellite.