Description: The evolution of quasars is the study of how quasars change over time, including their formation, growth, and eventual decline. Quasars, which are active galactic nuclei powered by supermassive black holes, represent an early phase in the life of galaxies. Their extreme luminosity, which can exceed that of billions of stars combined, is due to matter falling into the black hole, generating enormous amounts of energy. As a quasar evolves, its activity can vary, resulting in significant changes in brightness and spectrum. This evolution is crucial for understanding the formation and development of galactic structures in the universe. Quasars also serve as tools for studying the cosmos, as their light can traverse intergalactic space and provide information about dark matter and the expansion of the universe. Research on quasar evolution not only sheds light on the nature of these fascinating objects but also offers clues about the history of the universe itself, from its formation to its current state.
