An active galactic nucleus (AGN) is a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum...

structure. These energetic radio lobes are powered by jets from its active galactic nucleus. They have luminosities up to 1039 W at radio wavelengths between...

about 40 million light-years (12.5 megaparsecs). NGC 5643 has an active galactic nucleus and is a type II Seyfert galaxy. The galaxy was first discovered...

the Milky Way's 1 M☉ per annum of star production); the central active galactic nucleus attested to not have been producing sufficient energy to ionize...

region. The coexistence of a circumnuclear starburst ring and an active galactic nucleus have turned NGC 7469 into a key target for studying their relation...

structures, with diameters of 0.5 and 1.67 arcminutes. NGC 1386 has an active galactic nucleus (AGN) that has been categorised as a type 2 Seyfert galaxy. It...

"active" if they contain an active galactic nucleus (AGN). A significant portion of the galaxy's total energy output is emitted by the active nucleus instead...

Nucleus may also refer to: Active galactic nucleus in astronomy Comet nucleus, the solid, central part of a comet Cell nucleus, a central organelle of a...

general Active galactic nucleus Galactic bulge Galactic disc Galactic habitable zone Galactic halo Dark matter halo Galactic corona Galactic magnetic...

of active galactic nucleus (AGN) or a galaxy with such an AGN, named after its prototype, BL Lacertae. In contrast to other types of active galactic nuclei...

2782 is approximately 100,000 light years across. NGC 2782 has an active galactic nucleus and it is a starburst and a type 1 Seyfert galaxy. NGC 2782 is...

giant elliptical galaxy with large amounts of gas, dust, and an active galactic nucleus (AGN) at its core. The AGN is radio-quiet with no evidence for...

luminous quasars known. As a quasar, TON 618 is believed to be the active galactic nucleus at the center of a galaxy, the engine of which is a supermassive...

Gary; Diamond-Stanic, Aleksandar M. (1 May 2010). "Unobscured Type 2 Active Galactic Nuclei". The Astrophysical Journal. 714 (1): 115–129. arXiv:1004.2077...

is an interacting grand-design spiral galaxy with a Seyfert 2 active galactic nucleus. It lies in the constellation Canes Venatici, and was the first...

2523 does not have much star formation, and it does not have an active galactic nucleus. NGC 2523 is one of several galaxies chosen by Halton Arp as an...

to have lots of star-formation, and it is not known to have an active galactic nucleus. "By Name | NASA/IPAC Extragalactic Database". ned.ipac.caltech...

Swift, XMM-Newton and Chandra revealed a powerful, highly obscured active galactic nucleus. This new result suggests that the AGN might not require fading...

A quasar (/ˈkweɪzɑːr/ KWAY-zar) is an extremely luminous active galactic nucleus (AGN). It is sometimes known as a quasi-stellar object, abbreviated QSO...

observations of a rapidly growing supermassive black hole known as an active galactic nucleus, or AGN. Oxygen atoms in the WHIM were seen to absorb X-rays passing...

Look up agn in Wiktionary, the free dictionary. AGN may refer to: Active galactic nucleus Acute glomerulonephritis Agutaynen language Allergan (stock symbol...

galaxy to Earth, as well as the closest BL Lac object, so its active galactic nucleus has been extensively studied by professional astronomers. The galaxy...

particles of a type that interacts with ordinary matter. Near an active galactic nucleus, one of these particles can fall into the black hole, while the...

the core. It has an active supermassive black hole at its core, which forms the primary component of an active galactic nucleus. The black hole was imaged...

06 billion light-years from Earth. First discovered as a triple active galactic nucleus (AGN) candidate in a Sloan Digital Sky Survey study published in...

structure (rs) and moderate to loosely wound spiral arms. It has an active galactic nucleus and is classified as a starburst galaxy containing a massive nuclear...

heterogeneous halo of extremely hot gas, posited to be due to the active galactic nucleus at the core of the central elliptical galaxy. M87 is the largest...

The spectrum of the source at the core is consistent with an active galactic nucleus, but an examination with the Spitzer Space Telescope showed no...

is now considered a barred spiral. Messier 77 is an active galaxy with an active galactic nucleus (AGN), which is obscured from view by astronomical dust...

20 microarcseconds, producing errors of 10% in measurements as far as the Galactic Centre, about 8000 pc away in the constellation of Sagittarius. Distances...