Seyfert galaxies are a type of active galaxy characterized by their bright centers, known as nuclei, which emit strong radiation across various wavelengths. They are named after the American astronomer Carl Seyfert, who identified them in the 1940s. These galaxies are typically spiral in shape and contain supermassive black holes at their cores, which are responsible for the intense energy output. There are two main types of Seyfert galaxies: Type 1 and Type 2. Type 1 Seyfert galaxies exhibit broad emission lines in their spectra, indicating fast-moving gas, while Type 2 Seyfert galaxies show narrow emission lines. This difference is attributed to the orientation of the galaxy and the viewing angle of the central black hole.