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In the paper are studied the deformations of the planetary orbits caused bythe time dependent gravitational potential in the universe. It is shown thatthe orbits are not axially symmetric and the time dependent potential does notcause perihelion precession. It is found a simple formula for the change of theorbit period caused by the time dependent gravitational potential and it istested for two binary pulsars.Comment: 7 page

Time dependent gravitational potential in the universe and some consequences