active galaxy

types of active galaxy

The different features of an active galactic nucleus (AGN), and how our viewing angle determines what type of AGN we observe. The extreme luminosity of an AGN is powered by a supermassive black hole at the center. Some AGN have jets, while others do not. Image credit: Aurore Simonnet, Sonoma State University.

An active galaxy is any galaxy with an active galactic nucleus. Examples of active galaxies include Seyfert galaxies, BL Lacertae objects, and quasars.