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Astronomy

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  • $\begingroup$ Are you aware of black holes in x-ray binaries? $\endgroup$
    – Daddy Kropotkin
    Commented Nov 25, 2021 at 20:59
  • 1
    $\begingroup$ Could you edit the "scientifically" out of your title? How else would it be kept, if it exists? Unscientifically, bu Covid-19 denialists? It's somewhat confusing when reading your question. Contrary to popular thinking, the word 'scientific' isn't a magic faerie that makes all problems go away in an argument. $\endgroup$
    – AtmosphericPrisonEscape
    Commented Nov 25, 2021 at 23:22
  • 1
    $\begingroup$ Related if not duplicate: astronomy.stackexchange.com/q/39117/34513 $\endgroup$
    – Jean-Marie Prival
    Commented Nov 26, 2021 at 9:24
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    $\begingroup$ "Are black holes, detected only by the capture of gravitational waves"? And then you quote an example of one that has been discovered by gravitational lensing... $\endgroup$
    – ProfRob
    Commented Nov 26, 2021 at 15:25
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    $\begingroup$ @ProfRob The quoted BH example (NGC 1850 BH1) was discovered by measuring radial velocity variations in the visible companion; no gravitational lensing was involved. (You have to read the actual paper to understand this; the sci-news.com article is a garbled condensation of an ESO press release.) $\endgroup$
    – Peter Erwin
    Commented Nov 26, 2021 at 16:28