7240Fwd = "How Old is the Universe?"
- Mar 1, 2001Forwarded 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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