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The Great Space Coaster: Expansion of the Universe Now Measured in an Era before Dark Energy Takes OverQuicklink submitted by Scott Baker Permalink |
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 A graph showing how the universe's expansion rate has changed over the last 10-billion years. by Zosia Rostomian, LBNL, and Nic Ross, BOSS Lyman-alpha team, LBNL |
For the past five-billion years, the expansion of the universe has been powered by a mysterious repulsive force known as 'dark energy.' Now, thanks to a new technique for measuring the three-dimensional structure of the distant universe, scientists in an international team within the Sloan Digital Sky Survey (SDSS-III), including an astronomer at Penn State University, have made the first measurement of the rate of this cosmic expansion as it was just three-billion years after the Big Bang. |
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Look at that Curve!
by Dante DeNavarre on Friday, Nov 16, 2012 at 12:12:09 AM