Signs of second largest black hole in the Milky Way: Possible missing link in black hole evolution

Astronomers using the Nobeyama 45-m Radio Telescope have detected signs of an invisible black hole with a mass of 100 thousand times the mass of the Sun around the center of the Milky Way. The team assumes that this possible "intermediate mass" black hole is a key to understanding the birth of the supermassive black holes located in the centers of galaxies.