  The dynamic shift of the center of mass for a rotating hemisphere prompts us
the question of what might be its physical consequences. Despite the fact that
accelerating object is known to create gravitational field, there is no known
external dynamic gravitational force from a rotating sphere where the
individual mass components are in constant acceleration. However, Thirring's
`induced centrifugal force' and the component of the force along the
longitudinal axis inside a rotating spherical shell indicate that they are
non-radiative dynamic forces which depend on $\omega^2$. In this report,
Thirring's force is derived by considering the component-wise acceleration of
the rotating hemisphere in the weak field approximation. This new analytic
solution provides the gravitational explanation of the jet phenomena observed
from the fast rotating cosmological bodies, which demands a major revision in
our understanding of the universe since it suggests there exists a strong, long
ranged, non-Newtonian dynamic gravitational force in our universe. This also
raises an interesting question of how the strength of the dipole moment can be
maximized for a given mass by configuring the specific geometrical shape of the
rotating source.
