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7240Fwd = "How Old is the Universe?"

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  • Frits Westra
    Mar 1, 2001
    • 0 Attachment
      Forwarded by: fwestra@...
      Originally from: Scout Project <scout@...>
      Original Subject: The Scout Report for Science & Engineering -- February 28, 2001
      Original Date: Wed, 28 Feb 2001 20:20:07 -0600

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      "How Old is the Universe?"

      The first reading from a cosmic "uranium clock" using The European
      Southern Observatory (ESO) Very-large Telescope (VLT) UV-Visual
      Echelle Spectrograph came out this month. The Chilean-based VLT is
      the world's largest optical telescope array. It holds a visual
      spectograph that was used to measure the amount of the radioactive
      isotope Uranium-238 in a star named CS 31082-001 that was born when
      our galaxy was still forming, the first measurement ever of uranium
      outside the Solar System. This press release from ESO talks about the
      VLT and spectograph, the Uranium dating method used, and the
      implications that the measurements hold for the history of the
      universe. A graph of intensity vs. wavelength for the uranium
      spectrum of old star CS 31082-001 and a telescope image of the star
      are included (.jpeg - choice of pixel resolution). [HCS]

      From The Scout Report for Science & Engineering, Copyright Internet
      Scout Project 1994-2001. http://scout.cs.wisc.edu/

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