The nature of creation and orbiting of the planets and satellites.- Physical meaning of hydrostatic equilibrium of celestial bodies.- Physical meaning of dynamical equilibrium of an interacting body.- Jacobi\'s virial equation as a basis of the theory of dynamical equilibrium of natural systems.- Solution of Jacobi\'s virial equation for conservative and dissipative systems.- Creation, separation and orbiting of the Solar System bodies.- Evolutionary processes as a consequence of dynamical effects.- The Nature of electromagnetic field of a celestial body and mechanism for its generation.- Decay and creation of a hierarchic body system at expansion and attraction of the force field.