February 19 three articles in the international academic journal Science and Astrophysics jointly released the latest accurate measurement results of the first stellar black hole X1 Cygnus.
Joint international scientific research teams such as the National Observatory found that X1 Cygnus contains a black hole with 21 solar masses and its rotation speed is extremely close to the speed of light.
First discovered in 1964, X1 Cygni is an X-ray binary star system that contains a blue giant in addition to dense stars that can produce X-ray sources.
In the 1990s, increasing observational evidence showed that the dense star at the center of the system should be a black hole, which was also the first stellar-level black hole discovered by human beings.
In the latest observation research, three teams from Australia, the United States and China independently measured the distance, mass, spin and evolution of the black hole, and finally obtained that the latest distance of the X1 Cygnus black hole is more than 7,200 light-years, and it was found that the system contains a 21-fold sun.
Massive black hole, and the black hole’s visual interface is rotating at least 95% of the speed of light, which is the only X-ray binary system that has been discovered and confirmed by human beings that has a mass of the black hole more than 20 times the mass of the Sun and rotates so fast.