Re: OT: Dyson's Disaster

Anton Sherwood wrote:
>Andreas Johansson wrote:
> > Another problem: While the sphere won't be attracting anything inside
>it,
> > any bodies within it will attract eachother, wherefore air will be
> > dropping into the sun. Spinning the sphere won't help, since the air at
> > the poles would still fall into the sun, creating a low pressure that
> > sucks in more air und so weiter.
>
>The poles would then be effectively at high altitude.
>Does the low pressure on mountaintops suck in air from below?
Yes - that's why the atmosphere don't fall to the ground.

                                                Andreas

PS You may notice that one a terrestrial mountaintop gravity pulls you
downward, while at the sphere's poles it pulls you "up", that is, towards
the sun.

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