[ExI] If you follow the developments with Tabby's star . .

[Anders]

On 2016-09-16 19:20, John Clark wrote:
>
> ​O​
> n Fri, Sep 16, 2016 at 3:59 PM, BillK <pharos at gmail.com 
> <mailto:pharos at gmail.com>> wrote:
>
>     1) Tabby's star has one or more partially constructed Niven Rings.
>
>
> ​But what are those ​
> Niven Rings
> ​ made of?​ Yes I know u
> nobtainium
> ​ but the trouble is the only thing that would have sufficient tensile 
> strength to build such a ring would be the degenerate matter that make 
> up Neutron Stars, and there would be 2 problems with using that:

Neutronium may also be be a superfluid (strictly speaking it is 
different from degenerate matter, which can be solid). The always 
amusing A.A. Bolonkin has some calculations on nuclear density composites:
http://docsdrive.com/pdfs/sciencepublications/ajeassp/2009/501-514.pdf
He estimates a tensile Young's modulus of 1.6*10^32 N/m^2. If one could 
make his composite some serious megascale engineering becomes possible.




-- 
Dr Anders Sandberg
Future of Humanity Institute
Oxford Martin School
Oxford University

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