Astronomers sight the Big Bang's sound waves

From: International Herald Tribune | Date: January 13, 2005| Author: | Copyright information

Kenneth Chang
International Herald Tribune
01-13-2005
Astronomers reported this week that they had convincingly seen, in the patterns of galaxies scattered across the night sky, the vestiges of sound waves that rumbled through the universe after the Big Bang. Stars and galaxies tended to form along the ripples of the sound waves where matter was slightly denser, and the pull of gravity was slightly stronger. The ripples preserve a picture of the universe when it was only about one million years old and fit well with astronomers' ideas of how the universe, which started smooth and uniform, ...

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