Spiral Galaxies - Sixty Symbols

2011-07-15

[public] 139K views, 2.38K likes, 20.0 dislikes audio only

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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