Is the solar system disintegrating? - this is the main question addressed in the book. Along with the problem of stability, the "strength" of the solar system as a single mechanical whole, the book details the results of various studies of the motion of individual groups of bodies of the solar system (asteroids, comets, satellites) at long, cosmogonic time intervals. A large section of the book is devoted to the structure of the solar system and the physical characteristics of the celestial bodies included in it. The author gives numerous examples from the history of the development of celestial mechanics.