Eotvos experiments, lunar ranging and the strong equivalence principle

Details Eotvos experiments, lunar ranging and the strong equivalence principle Eotvos experiments, lunar ranging and the strong equivalence principle

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990natur.347..261a&link_type=abstract

Nature (ISSN 0028-0836), vol. 347, Sept. 20, 1990, p. 261-263. Research supported by NSF.

Computer Science

6

Earth Gravitation, Gravitational Fields, Lunar Rangefinding, Relativity, Earth-Moon System, Field Strength, Gravity Anomalies

Scientific paper

The strong form of Einstein's equivalence principle can be tested by comparing the accelerations of the earth and the moon toward the sun. Here, laboratory upper limits on 'fifth forces' are reviewed in order to set an upper limit of one part in a trillion on the earth-moon acceleration difference due to nongravitational forces. Existing lunar ranging data then verify the strong equivalence principle to an accuracy of 3 percent, and improved analysis of the lunar data should bring this precision down to the 0.2 percent level.

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