Ancient dawn's early light refines age of universe

Satellite images reveal new aspects of Big Bang's relic radiation

By Ron Cowen, 16:09 PM February 2, 2010

Six papers posted online present new satellite snapshots of the earliest light in the universe. By analyzing these images, cosmologists have made the most accurate determination of the age of the cosmos, have directly detected primordial helium gas for the first time and have discovered a key signature of inflation, the leading model of how the cosmos came to be.

The analysis, based on the first seven years of data taken by NASA’s Wilkinson Microwave Anisotropy Probe, also provides new evi...

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