Seyfert 1 galaxies are a type of active galaxy characterized by their bright nuclei and strong emission lines in their spectra. They are named after the American astronomer Carl Seyfert, who identified these galaxies in the 1940s. Seyfert 1 galaxies are known for their variability in brightness and are often associated with supermassive black holes at their centers. These galaxies typically exhibit broad emission lines, indicating high-velocity gas moving close to the black hole. This broadening is a result of the intense gravitational forces at play. Seyfert 1 galaxies are important for studying the behavior of matter in extreme conditions and the evolution of galaxies over time.