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Science 12 May 2000:
Vol. 288. no. 5468, p. 944
DOI: 10.1126/science.288.5468.944
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News of the Week

PHYSICS:
A Slow Carousel Ride Gauges Gravity's Pull

Charles Seife

Physicists at the University of Washington, Seattle, have released the most precise measurement yet of the strength of gravity, represented by a universal constant nicknamed "big G," thanks to a clever new device. At last week's meeting of the American Physical Society, they announced that they had measured big G with an error of a mere 14 parts per million--about 10 times better than previous measurements. The key to the newfound precision was keeping their experimental apparatus in constant motion.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)