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

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  • Nicolas Dauphas

    (The University of Chicago)

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.

Suggested Citation

  • Nicolas Dauphas, 2005. "The U/Th production ratio and the age of the Milky Way from meteorites and Galactic halo stars," Nature, Nature, vol. 435(7046), pages 1203-1205, June.
    • Handle: RePEc:nat:nature:v:435:y:2005:i:7046:d:10.1038_nature03645
    DOI: 10.1038/nature03645
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