XPost: sci.electronics.design   
   From: PointedEars@web.de   
      
   Ian wrote:   
   > Stefan Ram wrote:   
   >> Jan Panteltje  wrote or quoted:   
   >>> What are the effects of magnetic field lines on star formation in   
   >>> galaxies?   
   >>   
   >>   These natural magnetic fields in galaxies and their gradients,   
   >>   I think, are relatively weak. Over long timescales and over larger   
   >>   spatial regions, their effects can accumulate and become noticeable.   
   >>   But to drive a spacecraft, you'd need fields that are fairly strong   
   >>   at the location of the ship and at the moment the ship is there.   
   >   
   > You also need a large _gradient_ of magnetic field.   
      
   What is that even supposed to mean?   
      
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