Describe the links between galaxies, black holes and quasars. - AQA - A-Level Physics - Question 3 - 2018 - Paper 4

Quasars are immense energy sources produced by supermassive black holes, which reside at the center of galaxies. These black holes pull in vast amounts of gas and dust, creating an accretion disk that emits extraordinary radiation, making quasars some of the brightest objects in the universe. Therefore, the connection is that quasars indicate the presence of black holes in active galaxies, highlighting the relationship between these celestial objects.