An excerpt from the Planetarium Show "The Hot and Energetic Universe".
This video depicts an active galaxy. The observed characteristics of an active galaxy depend on several properties such as the mass of the central black hole, the rate of gas accretion onto the black hole, the orientation of the accretion disk, the degree of obscuration of the nucleus by dust, and whether jets are present.Kilde:
Th. Matsopoulos, NASA/ESA