bn:01011557n
Noun Concept
Categories: Articles with short description, Astronomical classification systems, Active galaxy types, Concepts in astronomy
EN
active galactic nucleus  Active galaxy nuclei  Galaxy AGN classification  active galactic nuclei  active galaxies
EN
An active galactic nucleus is a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that the luminosity is not produced by stars. Wikipedia
Definitions
Relations
Sources
EN
An active galactic nucleus is a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that the luminosity is not produced by stars. Wikipedia
A compact region at the center of a galaxy that has a much higher than normal luminosity over at least some portion, and possibly all, of the electromagnetic spectrum. Wiktionary