Active galactic nucleus
An active galactic nucleus (AGN) 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. Such excess non-stellar emission has been observed in the radio, microwave, infrared, optical, ultra-violet, X-ray and gamma ray wavebands. A galaxy hosting an AGN is called an "active galaxy". The non-stellar radiation from an AGN is theorized to result from the accretion of matter by a supermassive black hole at the center of its host galaxy.
AGN classificationActive Galactic NucleiActive Galactic NucleusActive GalaxyActive Galaxy NucleiActive Galaxy NucleusActive galactic nucleiActive galaxiesActive galaxyActive galaxy nucleiActive galaxy nucleusBroad-Line RegionBroad-line regionGalactic nucleusGalaxy AGN classificationGalaxy active galactic nucleus classificationGalaxy agn classificationHost galaxyNarrow-line regionSeyfert flareUnited Theory of Active Galaxies
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3C 1473C 2363C 244.13C 2733C 353C 3713C 4493C 454.33C 66A3C 66B9SpitchA1703 zD6AGILE (satellite)AGNAGN classificationAPM 08279+5255Absolute magnitudeAccretion diskActive Galactic NucleiActive Galactic NucleusActive GalaxyActive Galaxy NucleiActive Galaxy NucleusActive galactic nucleiActive galaxiesActive galaxyActive galaxy nucleiActive galaxy nucleusAdvanced Telescope for High Energy AstrophysicsAgata RóżańskaAkari_(satellite)Alex FilippenkoAllen Telescope ArrayAmri WandelAndrew FabianAndrew Lawrence (astronomer)Andromeda GalaxyAndromeda–Milky Way collisionApril–June 2020 in scienceArp 187
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Active galactic nucleus
An active galactic nucleus (AGN) 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. Such excess non-stellar emission has been observed in the radio, microwave, infrared, optical, ultra-violet, X-ray and gamma ray wavebands. A galaxy hosting an AGN is called an "active galaxy". The non-stellar radiation from an AGN is theorized to result from the accretion of matter by a supermassive black hole at the center of its host galaxy.
has abstract
Actieve sterrenstelsels is een ...... nuclear emission-line region).
@nl
Aktivní galaktické jádro (AGN ...... rafialové, rentgenové a gama).
@cs
An active galactic nucleus (AG ...... anced by relativistic beaming.
@en
En aktiv galaxkärna, AGN, är e ...... unga blå stjärnor observerats.
@sv
En astronomie, une galaxie act ...... tes aux modèles cosmologiques.
@fr
Galaktyka aktywna – galaktyka, ...... ako paliwo dla czarnej dziury.
@pl
Galaxia aktiboa bere erdigunet ...... e galactic nucleus) akronimoa.
@eu
Inti galaksi aktif (bahasa Ing ...... klasifikasikan sebagai kuasar.
@in
Uma galáxia ativa é uma galáxi ...... trições nos modelos do cosmos.
@pt
Un nucli de galàxia actiu (AGN ...... ons en els models cosmològics.
@ca
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1.023.732.036
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Actieve sterrenstelsels is een ...... ren uit de omgeving verslindt.
@nl
Aktivní galaktické jádro (AGN ...... rafialové, rentgenové a gama).
@cs
An active galactic nucleus (AG ...... the center of its host galaxy.
@en
En aktiv galaxkärna, AGN, är e ...... värdgalax, kallas aktiv galax.
@sv
En astronomie, une galaxie act ...... umineuses de l'univers, et com
@fr
Galaktyka aktywna – galaktyka, ...... kie oraz promieniowanie gamma.
@pl
Galaxia aktiboa bere erdigunet ...... e galactic nucleus) akronimoa.
@eu
Inti galaksi aktif (bahasa Ing ...... supermasif di tengah galaksi.
@in
Uma galáxia ativa é uma galáxi ...... trições nos modelos do cosmos.
@pt
Un nucli de galàxia actiu (AGN ...... ons en els models cosmològics.
@ca
label
Actief sterrenstelsel
@nl
Active galactic nucleus
@en
Aktiv galaxkärna
@sv
Aktiva galaksio
@eo
Aktiver Galaxienkern
@de
Aktivní galaktické jádro
@cs
Galaktyka aktywna
@pl
Galassia attiva
@it
Galaxia activa
@es
Galaxia aktibo
@eu