On 11-04-21 11:17 AM, john wrote:
On Apr 21, 8:43 am, Yousuf wrote:
On 4/21/2011 8:45 AM, john wrote:
The arms break up about as frequently as
electrons break up.

Since when do electrons break up?

They don't.
And neither do galactic arms.
john

Well, actually according to simulation, the galactic arms break up ever
80-100 million years, to be immediately replaced by new ones.

Yousuf Khan