Celestial Mechanics has undergone, in the past three years, a considerable development that has been marked by a significant increase of published papers and by the recent organization of several specialized colloquia or symposia. The reasons of this increase of interest may be found among the following circumstances:

1. - The discovery of new dynamical situations in the Solar system: ellipticity of ringlets, shepherd satellites.

2. - The increase of interest in the problem of the dynamical evolution of the solar system or of its subsystems.

3. - The present necessity to include relativistic effects in the theory of motion of celestial bodies.

4. - New promising results in the analysis of the properties of dynamical systems.