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Vesto Slipher's specrograph.
Used to work out redshift of distant objects that finally led to the understanding of the expansion of the universe. Taken with a D60 at Lowell Observatory, Flagstaff, AZ

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Wednesday, August 12 2009 @ 01:33 PM EDT
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Media ID 200908171342560  
Date Wednesday, August 12 2009 @ 01:33 PM EDT
Comments 0
Views 2736
Uploaded By SJPorter
  • Vesto Slipher's specrograph.
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