Gravitational Constant: Experimental Bound on Its Time Variation

Details Gravitational Constant: Experimental Bound on Its Time Variation Gravitational Constant: Experimental Bound on Its Time Variation

Jan 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971phrvl..26...27s&link_type=abstract

Physical Review Letters, vol. 26, Issue 1, pp. 27-30

Physics

72

Scientific paper

Analysis of radar-echo time delays, primarily between Earth and Mercury, yields an upper limit on the fractional variation of the gravitational constant of 4 parts in 1010 per year. Continuation of these radar measurements for five more years-even at the present level of accuracy-would allow the uncertainty to be reduced reliably to 3 parts in 1011 per year, a limit close to the effect predicted by some theorists.

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