At 12:22 PM 10/14/2004, David Minkler wrote:

>Not true.  It's an "equal and opposite reaction" thing.
>
>If you were to throw rocks in free space, you would propel yourself in the 
>opposite direction to your rock shower.  It wouldn't make one bit of 
>difference if the rocks that you threw then hit rocks that you had 
>previously thrown.

Absolutely.

And while solar wind is nice, light pressure also exists.
http://www.europhysicsnews.com/full/07/article4/article4.html
http://www.technovelgy.com/ct/content.asp?Bnum=349



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