BL lacertae objects

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• BL Lacertae — or BL Lac is a highly variable, extragalactic AGN (active galactic nucleus or active galaxy). It was first discovered by Cuno Hoffmeister in 1929 [cite journal | last= Hoffmeister |first= Cuno |year= 1929 |title=354 neue Veränderliche|journal=… …   Wikipedia

• Beta Lacertae — β Lacertae Observation data Epoch J2000.0      Equinox J2000.0 (ICRS) Constellation Lacerta Right ascension 22h 23m 33.6235s[1] …   Wikipedia

• Blazar — A blazar is a very compact and highly variable energy source associated with a presumed supermassive black hole at the center of a host galaxy. Blazars are among the most violent phenomena in the universe and are an important topic in… …   Wikipedia

• BL Lac object — A BL Lacertae object or BL Lac object is a type of active galaxy with an active galactic nucleus (AGN) and is named after its prototype, BL Lacertae. In contrast to other types of active galactic nuclei, BL Lacs are characterized by rapid and… …   Wikipedia

• List of quasars — This is a list of quasars.Proper naming of quasars are by Catalogue Entry, Qxxxx±yy using B1950 coordinates, or QSO Jxxxx±yyyy using J2000 coordinates. They may also use the prefix QSR.List of quasarsList of visual quasar associationsThis is a… …   Wikipedia

• Host galaxy — A host galaxy is one with an active galactic nucleus at its core. Most powerful quasars and all BL Lacertae objects appear to be situated within giant elliptical galaxies …   Wikipedia

• Lacerta — Infobox Constellation name = Lacerta abbreviation = Lac genitive = Lacertae symbology = the Lizard RA = 22.5 dec= +45 areatotal = 201 arearank = 68th numbermainstars = 5 numberbfstars = 17 numberstarsplanets = 1 numberbrightstars = 0… …   Wikipedia

• List of astronomy acronyms — This is a compilation of acronyms commonly used in astronomy. Most of the acronyms are drawn from professional astronomy and are used quite frequently in scientific publications. However, a few of these acronyms are frequently used by the general …   Wikipedia

• NGC 7243 — Observation data (2000.0 epoch) Constellation Lacerta Right ascension 22h 15m 08.6s Declination …   Wikipedia

• Altair — This article is about the star in the constellation Aquila. For other uses, see Altair (disambiguation). Altair …   Wikipedia

• Coma Berenices — For other uses, see Coma Berenices (disambiguation). Coma Berenices Constellation List of stars in Coma Berenices Abbreviation Com Gen …   Wikipedia