"Micky" wrote in message
...
I disagree. If you are going to be travelling on a one way trip. And
totally
independant posibly not returning to earth in hundreds of years I think
you
do.....

"Mike Combs" wrote

One doesn't really need anything beyond 2 meters of shielding, even for
life-time exposures.

You are basing your opinion, as far as I can tell, on what you "think". I'm
basing my opinion on peer-reviewed NASA studies:
http://lifesci3.arc.nasa.gov/SpaceSe.../5appendE.html

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Regards,
Mike Combs
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Member of the National Non-sequitur Society. We may not make
much sense, but we do like pizza.