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Science 28 April 2000:
Vol. 288. no. 5466, p. 593
DOI: 10.1126/science.288.5466.593a
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News of the Week

PHYSICS:
Relativity Passes a Tough Cosmic Test

Govert Schilling

The idea that the speed of light is independent of the velocity of the light source has been a central postulate of special relativity for almost a century. Now, a rigorous test has shown that it is indeed true, to at least 20 decimal places. On 29 April, at the April meeting of the American Physical Society in Long Beach, California, an astronomer will report how he confirmed Einstein's assumption by studying distant gamma ray bursts, violent explosions at the edge of the observable universe.

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