Before now, scientists did not think it was possible for a stellar black hole to have a mass larger than 20 times that of the sun, an approximation based on their understanding of the way stars evolve and die in the Milky Way.
Washington Post: Scientists find ‘monster’ black hole
This handout received from the Beijing Planetarium via the China Academy of Sciences on Nov. 26, 2019 shows a rendering by artist Yu Jingchuan of the accretion of gas onto a stellar black hole from its blue companion star, through a truncated accretion disk.
