Abstract:

The PostNewton approximation method is adopted to discuss the geodesic equations of a test particle in the gravitational field of a CM celestial body from the PostNewtonian metric tensor. When the parts of the magnetic charge and the magnetic moment are neglected, those equations transform into the equations obtained in the Schwarzschild gravitational field. Those equations have very important meanings in the research of the influence of longperiod orbital variation on the evolution of star galaxies.

Key words: CM celestial body; geodesic equations; postNewton approximation; test particle