OT: Dyson's Disaster

> Lars Henrik Mathiesen wrote:
>> 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.
Andreas Johansson wrote:
> 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. . . .
But there is a force from the sun on each part of the sphere.  The
forces are globally balanced, but the local mass doesn't know that. ;)

If the sphere is infinitely rigid, of course, that's not a problem.


--
Anton Sherwood  --  http://www.ogre.nu/