  Gravitomagnetism resulting from SR has been applied to geodetic precession
and frame dragging. The substantial contribution of the "fictitious" Coriolis
force, due to the relative rotation of the rest of the Universe in the non
inertial frame of the free falling but rotating satellite, has to be taken into
account, giving another quantitative confirmation of Mach's arguments and of
the black hole nature of our Universe. Also the gravitational clock effect has
an elementary prediction in the present post Newtonian formulation. A
derivation of the centrifugal force from an effective vector formulation of
gravitation is attempted. The centrifugal force appears to be due to a
relativistic effect of the counter-rotating Universe. Gravitomagnetic energy
effects, a million times stronger than the self energy effects responsible for
curvature in the GR language, would thus produce the centrifugal acceleration.
The Machian picture, already successful in the case of the Coriolis force, gets
an additional circumstantial support.
