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Posted by Herb S. on October 13, 2002 04:07:57 UTC

Two major clues to the origin are:
1. The radiation is, to a very high degree, independent of direction. The small fluctuations are consistent with what is needed to allow for galaxy formation.
2. The temperature (2.7 deg K) is consistent with the temperature (at about 300,000 years after the big bang) at the time when hydrogen atoms would stabilize. The current temperature is the result of the expansion from then till now.

If you want to look further try:
http://www.damtp.cam.ac.uk/user/gr/public/bb_home.html

Use google to search under "big bang" for other sources. The above is first on the list.

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