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Fri, 03 Feb 2012 15:28:04 -0800
In 1931, the close approach of the asteroid Eros allowed professional astronomers to calculate its distance and make that era's most accurate measurement of the solar system. As the asteroid passes near Earth this week, amateur astronomers and students from around the world seek to recreate the historical experience.
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Sun, 05 Feb 2012 14:34:58 -0800
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