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Chaos' lil bro Order
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This is a nice little article on the history of the Hubble Constant and its refinement over time. There is also a summary of the 8 year Cepheid Variable study headed by Wendy Freedman of the Carnegie Observatory in it, in which they try to narrow down the limits of the Hubble Constant via 100s of Cepheid Variable observations. A nice little read.
http://physicsworld.com/cws/article/print/1036
http://physicsworld.com/cws/article/print/1036
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