[ExI] The Great Silence again
Richard Loosemore
rpwl at lightlink.com
Mon May 2 12:43:19 UTC 2011
Stefano Vaj wrote:
> On 30 April 2011 21:06, Keith Henson <hkeithhenson at gmail.com> wrote:
>> For a non rotating Dyson sphere that's thin enough the light pressure
>> would balance the gravity from the sun. The light pressure at the
>> distance of the earth's orbit is around 9.3 N per square km.
>
> Now that you make me think of it, in a non-rotating Dyson sphere
> object on the internal surface would be bound to fall towards the sun,
> right? The gravity of even a relatively thick surface would hardly
> compensate...
>
Uh, the gravity of even an infinitely dense spherical object would be
exactly zero on the inside surface.
Gauss's law.
Richard Loosemore
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