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I'm considering a story where an exploration is devised to explore a binary system containing a black hole; the choice is Cygnus X-1, with its companion supergiant star HDE 226868. It would likely ...
#1: Attribution notice removed
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System
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2020-06-01T14:13:51Z (over 4 years ago)
Source: https://worldbuilding.stackexchange.com/q/71971 License name: CC BY-SA 3.0 License URL: https://creativecommons.org/licenses/by-sa/3.0/