Sixty Symbols
Spiral Galaxies - Sixty Symbols (2011x27)
Air date: Jul 15, 2011
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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- Premiered: Apr 2009
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