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Spiral Galaxies - Sixty Symbols

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  • 10 years ago
  • 129,140 views
  • 1,975 likes
  • 287 comments
What makes spiral arms in some galaxies - and what is "pattern speed'? Professor Mike Merrifield explains.

Extra footage at http://www.youtube.com/watch?v=Rsj0uODPW9I

Our thanks on this video to R. Jay GaBany from http://www.cosmotography.com/

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