Stellar-mass black holes, between 7 and 25 times the Sun’s mass, are called “micro-quasars” when they spawn powerful jets of particles and radiation, miniature versions of those seen in quasars. Stellar-mass black holes are on the small end of the scale opposite supermassive black holes, including those in quasars, which weigh millions to billions of times the mass of the Sun. … Continue reading "Don’t ‘Supermassive’ Me: Black Holes Regulate Their Own Mass"