On 24/04/2011 9:19 PM, Sam Wormley wrote:
On 4/21/11 7:45 AM, john wrote:


The arms break up about as frequently as
electrons break up.


Too bad you have never done any self-education about
density waves and spiral arms, John. You might want
to start he http://casa.colorado.edu/~danforth/science/spiral/


Actually, Sam, this study is debunking the density wave theory.

Yousuf Khan