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A comment on Highly relativistic spaceflight would be fatal for passengers and instruments. Parent comment

Re:Highly relativistic spaceflight would be fatal for passen... by fleitz on Monday November 05, 2012 @02:29AM (#4742601)
Which in this case would just be an incredibly strong magnetic field...
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Re:Highly relativistic spaceflight would be fatal for passen... by kansface on Monday November 05, 2012 @03:28AM (#4742718)
What about neutral particles?
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Re:Highly relativistic spaceflight would be fatal for passen... by ccozan on Monday November 05, 2012 @04:54AM (#4742877)
Answer: inhomogeneous magnetic fields. See the Stern–Gerlach experiment.

So basically your spaceship needs to have the core part in a spinning sphere generating such a magnetic field. Also not to forget the gravitational attraction which would make the free particles in space quite attracted to your bulk spaceship, following you like mosquitos :).

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