If aliens existed we could readily see copious surface engineering in galaxies: "The germs of existence [on] earth if they could freely develop themselves would fill millions of worlds in the course of a few thousand years"(Malthus) https://waitbutwhy.com/2014/05/fermi-paradox.html … https://www.centauri-dreams.org/2012/01/23/rethinking-setis-targets/comment-page-1/ …
-
Interesting. But the surface area available for radiation is a limiting factor, after that have to increase the temperature of the radiator if they want to convert more energy. Also what material would be strong enough to cross the event horizon of a black hole?
Oops I misread, the structure doesn't cross the event horizon, it just points at it (it does have to be close enough so that the event horizon cross-section dominates the sky -- don't know if that is possible).
-
-
This Tweet is unavailable
-
It would be in orbit around the black hole, so as long as it's not colliding with other objects in orbit it won't cost any energy
End of conversation
-
-
-
I might be missing something, but the gradient of the gravitational field near the event horizon of a big black hole could be very small. If so, you can get the radiator close enough so it covers almost half the sky without much tidal forces to deal with
Thanks. Twitter will use this to make your timeline better. UndoUndo
-
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.