A supermassive black hole is a type of black hole that has a mass that is millions to billions of times greater than that of the Sun. These black holes are typically found at the centers of galaxies, including our own Milky Way. Key characteristics of supermassive black holes include: 1. **Mass**: They range from about one million solar masses to several billion solar masses. Their immense gravity affects the motions of stars and gas in their vicinity.
