Re: Rzeczpospolita,was: Hi from Ukraine

Lars Henrik Mathiesen wrote:
>And there's the question of the dynamical stability of the whole
>thing. The central sun won't be attracted to the ring or sphere, by
>the same argument, but neither will there be any force tending to keep
>it in the center. And once the sun moves off center I think the
>nearest part of the structure must flex towards it, which will cause a
>net force to make it move even more.
Actually, displacing the sun from the centre won't change anything (except
the depth of your tan!) for the same reason that it won't be any force from
the sphere on the sun. Of course, this is no comfort, as if the sun starts
to move the slightest relative to the sphere it will sooner or later hit it
(Newton's first law). Then there's the little matter of the energy that
get's trapped inside. The sphere's outside will have to emit the same amount
of light as the inside receives, or it'll get quite hot. And don't ask me
where you find enough oxygen to fill the area inside the sphere (you need a
huge diametre for the inhabitants to survive starwind, flares, X-rays etc
etc).

                                          Andreas

                                                Andreas

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