Astronomers discover 83 supermassive black holes in early universe
A team of astronomers has discovered 83 quasars powered by supermassive black holes (SMBHs) in the early universe. This increases the number of black holes known at that epoch considerably, and reveals, for the first time, how common SMBHs were early in the universe's history. Supermassive black holes are found at the centers of galaxies, and have masses millions or even billions of times