XPost: sci.electronics.design, sci.astro
From: gay@sfu.ca

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. (Unless you have a
supply of magnetic monopoles :-))

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