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Archive Home > 2009 > October > 30 > Einstein comes out ahead in 7.3 billion-light-year race

Einstein comes out ahead in 7.3 billion-light-year race

Results of gamma-ray experiment back up theory that the speed of light is a constant

By Dennis Overbye / The Bulletin
October 30, 2009

Astronomers have announced that a race halfway across the universe has ended in a virtual tie. And so the champion is still Albert Einstein — for now.

The race was between gamma rays of differing energies and wavelengths spit in a burst from an exploding star when the universe was half its....

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