The U/Th production ratio and the age of the Milky Way from meteorites and Galactic halo stars

Nicolas Dauphas ()
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Nicolas Dauphas: The University of Chicago

Nature, 2005, vol. 435, issue 7046, 1203-1205

Abstract: Getting older Cosmologists, using cosmic clocks such as stellar beryllium accumulation, have determined the age of the Milky Way as around 13.6 billion years. A new calculation, based on the ratio of uranium-238 to thorium-232 in meteorites and galactic halo stars, gives an age quite close to that: 14.5 billion years. That's almost as old as the Universe itself.

Date: 2005
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DOI: 10.1038/nature03645

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