Slide 1 Class 25 : Active galactic nuclei Discovery of AGN (3C 273). What are AGN? Radio galaxies. AGN and colliding galaxies. Slide 2 I : The discovery of AGN Early 1960s……
Spiral Galaxies Elliptical Galaxies Irregular Galaxies Classification of Galaxies Properties of Galaxies Other galaxy types : Peculiar, Interacting, Ring, Starburst, Dwarf,…