View source for Active galactic nucleus

'''Active galactic nucleus''' is a compact region at the center of a galaxy that emits large amounts of energy across the electromagnetic spectrum. It is associated with accretion onto a supermassive black hole.

Active galactic nuclei are discussed in astrophysics, extragalactic astronomy, and high-energy astronomy.

== Status ==
Active galactic nuclei are identified through their spectral properties, variability, and energetic emissions. Models describe their structure, energy output, and interaction with host galaxies, and continue to be refined.

== Related topics ==
[[Galaxy]]

[[Supermassive black hole]]

[[Accretion disk]]

[[Astrophysics]]