  A density disturbance in a system of gravitating mass, induced by a moving
selected body gives rise to a dynamical screening of Newtonian potential of
this body. When applied to the solar planetary system it means that as a result
of the motion of the Sun in the Galaxy its effective force potential appears
more weak than the Newtonian potential. The relevant modifications of main
relations of the solar dynamics are considered here and it is found in
particular that the reestimated period of the Earth revolution around the Sun
rises in 1 second per year and semimajor axis of the Earth orbit increases on 4
kilometers. Similar relations are obtained for other planets too. It may be
supposed that the inclusion of these effects can help to explain the observable
anomalous acceleration of spacecrafts Pioneer 10 and 11.
