简介:TheeccentricityofthecentreofmassfromthegeometriccentreofasphericalattractingmassindeterminingtheNewtoniangravitationalconstantGistestedbymeansofanelectronicbalance.Theexperimentalresultshowsthattheeccentricityofthesampleisabout0.31μmwithuncertaintyof0.05μm.TwodensitydistributionmodelsarediscussedtoestimatetheuncertaintytoGbytheeccentricitiesoftheattractingmasses.