[ExI] The Great Silence again

[Keith Henson]

On Mon, May 2, 2011 at 7:18 AM, Stefano Vaj <stefano.vaj at gmail.com> wrote:
> On 2 May 2011 15:38, Keith Henson <hkeithhenson at gmail.com> wrote:
>> No, but if it is a few hundred nanometers thick, the light pressure
>> will keep it in place.
>
> OK, let us say in conclusion that there is no way to create a Dyson
> sphere in the style of a "concave Earth", with people walking on the
> internal surface in a more or less normal fashion but seeing the
> horizon slip upwards...

There is a way to come close.  Larry Niven did it with the Ringworld
series of books.  http://en.wikipedia.org/wiki/Ringworld

You don't even need scrith (super strong material) to do it.  You spin
the inner part supported on magnetic bearings and pile the rest of the
material in the system on the outside and let solar gravity hold it
down.

Keith