Götterdämmerung
June 18, 2020•267 words
I've just been looking at my copy of Misner, Thorne & Wheeler. There is a spooky footnote in the introduction which must have been added late in the publication process, saying
As of April 1973, there are significant indications that Cygnus X-1 and other compact x-ray sources may be black holes.
When they wrote the book there were no known black holes, and I don't think everyone even thought they were physically plausible. I bought it in 1985, Hawking conceded his bet that Cygnus X-1 was...
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