Le 13/11/2012 13:04, Thomas de Groot a écrit :
> On 13-11-2012 9:48, Bill Pragnell wrote:
>> However, I do not believe the present artifact is supposed to encircle
>> a star,
>> or spin like a ringworld (at least not enough to generate significant
>> centrifugal forces). I like the idea that it is planet-scaled, generating
>> gravity by virtue of its own mass. It is difficult to see how it could
>> form
>> naturally of course...
> 
> My idea too. A torus with Earth's diameter at least as cross-section to
> generate the necessary gravity at the surface; the same composition,
> with a molten metallic core (inner torus). The whole structure orbiting
> a star... which would probably tear it apart, or free in the
> interstellar medium, with a need for a light and warmth source...
> 
> Interesting musing... ;-)

Oh yes, what about the magnetosphere ? (magnetotorus ??)
Is there a north pole too ?
(probably, assuming the inner torus has its own revolution speed)

Would the magnetic field looks like the tokamak helicoidal field ?

And for added fun: could such planet have a moon or more ?

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