stellar-mass black holes (about five to 50 times the mass of the sun), supermassive black holes (millions to billions of times the mass of the sun), and intermediate-mass black holes with masses somewhere in between.
stellar-mass black holes, which are about five to 50 times the mass of the sun; supermassive black holes, with millions to billions of times the sun’s mass; and intermediate-mass black holes, which fall somewhere in between.