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  2. Cygnus X-1
    • According to 3 sources
    The first black hole ever discovered was Cygnus X-1, located within the Milky Way in the constellation of Cygnus, the Swan. Astronomers saw the first signs of the black hole in 1964 via gas it sucked away from a closely orbiting blue supergiant star.
    The first object discovered widely accepted as a black hole is known as Cygnus X-1, a discovery made by Paul Murdin and Louise Webster in 1971. As its name suggests, it’s an X-ray source in the constellation of Cygnus.
    Cygnus X-1, companion object to the blue super giant star HDE 226868, is located in the constellation Cygnus at 19 hours 58 minutes 21.9 seconds Right Ascension and 35 degrees 12’ 9” Declination. Not only is it a black hole, but it is the first one to be discovered.
     
  3. All you need to know about the history of black holes

    Apr 10, 2019 · Hinted at as early as the 1780s and predicted by Einstein’s general theory of relativity, they didn’t get the name we know today until the 1960s. Bizarre beasts that squash gobs of matter...

  4. First black hole ever found is more massive than …

    Feb 18, 2021 · Stephen Hawking famously bet physicist Kip Thorne that the Cygnus X-1 system, discovered in 1964, did not include a black hole — and conceded the wager in 1990, when scientists had broadly...

  5. A brief history of black holes | Astronomy.com - Astronomy …

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  9. Cygnus X-1: The black hole that started it all

    Mar 3, 2021 · Today, we know black holes exist — we even have a picture of one! But scientists haven’t had definitive evidence of black holes for very long. The first one, Cygnus X-1, was discovered in...

  10. The first black hole discovered is much more …

    By making a more precise measurement of its distance from the Earth, a team led by the International Centre for Radio Astronomy Research (ICRAR) has concluded that the black hole is the most...

  11. The first black hole ever discovered is more massive …

    Feb 18, 2021 · Now, some 57 years later, scientists have learned that the black hole at Cygnus X-1 is much more massive than first believed—forcing us to once again rethink how black holes form and evolve.

  12. How black holes were first discovered - BBC Sky at …

    The first prediction of anything resembling a black hole goes all the way back to John Michell, over 200 years before black holes were first discovered, according to astrophysicist Becky Smethurst. The centre of the Milky Way, our home …

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