1.
Science
; 282(5397): 2230-4, 1998 Dec 18.
Article
in English
| MEDLINE
| ID: mdl-9856940
ABSTRACT
Recent determinations of the Newtonian constant of gravity have produced values that differ by nearly 40 times their individual error estimates (more than 0.5%). In an attempt to help resolve this situation, an experiment that uses the gravity field of a one-half metric ton source mass to perturb the trajectory of a free-falling mass and laser interferometry to track the falling object was performed. This experiment does not suspend the test mass from a support system. It is therefore free of many systematic errors associated with supports. The measured value was G = (6.6873 +/- 0. 0094) x 10(-11) m3 kg-1 sec-2.
2.
Phys Rev D Part Fields
; 47(8): 3106-3123, 1993 Apr 15.
Article
in English
| MEDLINE
| ID: mdl-10015928
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