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Tiny satellite tests gravity's grip
The fall of a tiny glass block in a Colorado laboratory yielded a new measurement of gravity's strength, increasing confidence in the most widely accepted value for the elusive gravitational constant.
References:
Schwarz, J.P., D.S. Robertson . . . J.E. Faller. 1998. A free-fall determination of the Newtonian Constant of gravity. Science 282(Dec. 18):2230.
Further Readings:
Peterson, I. 1996. Measuring the gravitational constant. Science News 149(May 18):319.
______. 1995. Gravity's force: Chasing an elusive constant. Science News 147(April 29):263.
Sources:
James E. Faller
National Institute for Standards and Technology
Quantum Physics Division (848)
Room A409
325 Broadway
Boulder, CO 80303
Douglas S. Robertson
University of Colorado, Boulder
Cooperative Institute for Research in Environmental Science
Campus Box 216
Boulder, CO 80309
From Science News, Vol. 155, No. 4, January 23, 1999, p. 63. Copyright © 1999, Science Service.
