Astronomers may need to adjust their expectations of black holes.according to New York Times, An international research team determined that one of the first black holes discovered, “Cygnus X-1”, was much larger than previously thought. A hole based on a binary star system was originally fixed to “only” 15 solar masses, but is now considered to be 21 solar masses.
When a supermassive black hole equals millions or even billions of solar masses, this may not sound like much, but it is enough to abandon existing models. Based on past estimates of the mass loss of stars, it is impossible to form massive black holes in the Milky Way-scientists may need to reconsider their calculations of these losses. The reason why Cygnus-X1 became a black hole is no longer fully certain.
This is not a complete shock. The team using the Laser Interferometer Gravity Wave Observatory (LIGO) usually observes that the mass of the black hole is larger than X-rays suggest. However, Cygnus X-1