[ExI] Will Advanced Civilizations Ever Build Dyson Spheres?

[Keith Henson]

On Sat, Nov 2, 2024 at 1:18 PM Ben Zaiboc via extropy-chat
<extropy-chat at lists.extropy.org> wrote:
>
> On 01/11/2024 23:38, BillK wrote:
>
> Most stars have planets, and even our solar system has a dozen
> water-rich moons that could be made habitable with a shift of their
> orbits and a bit of terraforming. Since this would be much easier than
> building a Dyson sphere, the authors argue that modified systems
> should be much more common. The only question is how to detect them.
>
> This is only valid if you assume biological beings.

I think it is safe to assume they started as biologicals.

> Personally, I don't think that any advanced civilisation would consist of biological beings, at least not primarily. I would expect moving beyond biology would come before moving into space, and that would shape the kind of space habitats you'd want to create.

> Data processing nodes are the thing to look for, not biological ecosystems, imo. (and yes, they will be a lot harder to spot. Another explanation for the Fermi Paradox?)

The biggest light dip for Tabby's star works out to be over 400 times
the area of the Earth and more than 12 AU out from the star.  I posted
the analysis here Aug 6 2023.  The power and heat sink budget has room
for trillions of uploaded aliens.

It is in orbit, and the sectional density is not high, so why not
extend it right around the star?  I suspect that speed-of-light
communication problems make larger structures undesirable.


> --
> Ben
>
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