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If you take a mechanical model of the solar system, grab the earth; then the sun will orbit it and the planets will "adopt" a elliptical orbit. However; observations of extra-solar system planets show that stars are stationary, except for a slight "wobble" as they ACTUALLY orbit their COMMON center of gravity which is VIRTUALLY near the star given it's having the bulk of the mass, thereby giving the impression of it being PERFECTLY stationary relative to a satellite. But; of the underlying physical mechanism whereby a larger object remains central there must be a "stay put" factor to it's superior "spinning power" even as a spinning top has the tendency to "stay put" whilst it is doing so.

Whether this phenomena is describable in physics I don't know.

Incidentally, the physics of the gyration of a spinning top, and also the similar precision of the equinoxes on earth is UNKNOWN and a great mystery in science.

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