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Some metric theories of gravity single out the mean rest-frame of the Universe as a (2) an anomalous yearly variation in the Earth's rotation rate; (3) an anomalous perihelion shift of the planets. We use gravimeter data, length-of-day data, and perihelion-shift data to put upper limits on the sizes of such anomalous effects. These limits rule out all the && preferred-frame" theories whose authors are listed above, and put an upper limit on the strength of a cosmological vector gravitational field. Other possible experimental tests of "prefen-ed-frame" theories are discussed.
Kenneth et al. (Wed,) studied this question.