bn:01011557n
Noun Concept
Categories: Active galaxy types, Articles with short description, Astronomical classification systems
EN
active galactic nucleus  Active Galactic Nuclei  Active Galaxy Nuclei  Active Galaxy Nucleus  Broad-line region
EN
An active galactic nucleus is a compact region at the center of a galaxy that has a much-higher-than-normal luminosity over at least some portion of the electromagnetic spectrum with characteristics indicating that the luminosity is not produced by stars. Wikipedia
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EN
An active galactic nucleus is a compact region at the center of a galaxy that has a much-higher-than-normal luminosity over at least some portion of 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