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Sky Survey Tells Story of Expanding Universe

Nov 13, 2012
Sky Survey Telescope
Sloan Sky Survey

Early in the history of the universe -- about three billion years after the Big Bang -- the expansion of the universe was slowing down.  Today, it's speeding up at a faster and faster pace. University of Utah astronomer Kyle Dawson is part of a group that's been studying the early universe by looking at how light from quasars affected hydrogen atoms in interstellar space.  The project is part of the Sloan Digital Sky Survey, which Dawson says gives them the very sophisticated tools to look at lots of objects in the far reaches of space.