Am 12.11.2012 19:50, schrieb Le_Forgeron:

> But on the upper/bottom side(circle) of the torus, it seems that, if the
> ground is just along the torus, the direction of a free water surface
> would not be parallel to the ground. Wouldn't there be a kind of
> desert/cliff making the transition on the small circle between both
> region ? would it be some desert or waterfall ?

Of course the gound itself, being subject to the same gravitational 
effcts, would settle in a non-perfect toroidal shape. (Similar to how 
the earth's shape is not spherical, due to the gravitational forces at 
the equator being partially offset by centrifugal forces.)

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