BL Lacertae object or BL Lac object is a type of active galactic nucleus (AGN) or a galaxy with such an AGN, named after its prototype, BL Lacertae....
8 KB (1,019 words) - 21:09, 30 July 2024
BL Lacertae or BL Lac is a highly variable, extragalactic active galactic nucleus (AGN or active galaxy). It was first discovered by Cuno Hoffmeister...
4 KB (368 words) - 21:03, 30 July 2024
Messier 87 (redirect from Messier Object 87)
a BL Lacertae object (of lower luminosity than its surrounds) seen from a relatively large angle. Flux variations, characteristic of the BL Lacertae objects...
90 KB (9,560 words) - 11:06, 18 July 2024
Lacerta (section Deep-sky objects)
stars. It also contains the prototypic blazar BL Lacertae. Lacerta contains no Messier objects. Alpha Lacertae is a blue-white hued main-sequence star of...
8 KB (730 words) - 15:43, 14 October 2023
Piscis Austrinus (section Deep sky objects)
(though still too faint to see with the naked eye); and PKS 2155-304, a BL Lacertae object that is one of the optically brightest blazars in the sky. Pisces...
24 KB (2,431 words) - 06:22, 27 August 2024
class of galaxy: BL Lacertae-type objects. This terminology was soon shortened to "BL Lacertae object", "BL Lac object" or simply "BL Lac". (The latter...
17 KB (2,115 words) - 06:25, 24 June 2024
Centaurus A (redirect from Caldwell Object 77)
light-years). It is the closest radio galaxy to Earth, as well as the closest BL Lac object, so its active galactic nucleus has been extensively studied by professional...
32 KB (3,247 words) - 23:57, 22 August 2024
BL Lac may refer to: BL Lacertae, an active galaxy, prototype of the BL Lacertae objects BL Lacertae object, a type of active galaxy, based on the prototype...
206 bytes (63 words) - 22:23, 9 April 2021
Cancer (constellation) (section Deep-sky objects)
Edward Fomalont and Sergei Kopeikin in September 2002. OJ 287 is a BL Lacertae object located 3.5 billion light years away that has produced quasi-periodic...
26 KB (3,028 words) - 04:21, 19 August 2024
Markarian 421 (category BL Lacertae objects)
blazar located in the constellation Ursa Major. The object is an active galaxy and a BL Lacertae object, and is a strong source of gamma rays. It is about...
7 KB (565 words) - 11:55, 14 May 2023