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A Dyson sphere around a black hole

(arxiv.org)
214 points SkyMarshal | 2 comments | 19 Aug 21 03:40 UTC | HN request time: 0.476s | source
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saagarjha ◴[19 Aug 21 05:02 UTC] No.28230503[source]▶
Better link: https://arxiv.org/abs/2106.15181

The results are fairly obvious: CMB and Hawking radiation provide almost zero power output, while an accretion disk and relativistic jets can provide a lot of power.

replies(2): >>28230601 #>>28231063 #
brador ◴[19 Aug 21 06:42 UTC] No.28231063[source]▶
How would you tap an accretion disk? How would you tap relativistic jets?
replies(3): >>28231072 #>>28231403 #>>28231426 #
1. tanbog4 ◴[19 Aug 21 07:50 UTC] No.28231426[source]▶
Heat water to produce steam, use steam to turn turbine. :P
replies(1): >>28231680 #
2. avereveard ◴[19 Aug 21 08:43 UTC] No.28231680[source]▶
steampunk had it right