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- Cygnus_A abstract "Cygnus A (3C 405) is one of the most famous radio galaxies, and among the strongest radio sources in the sky. It was discovered by Grote Reber in 1939. In 1951, Cygnus A, along with Cassiopeia A, and Puppis A were the first "radio stars" identified with an optical source. Of these, Cygnus A became the first radio galaxy; the other two being nebulae inside the Milky Way. In 1953 Roger Jennison and M K Das Gupta showed it to be a double source. Like all radio galaxies, it contains an active galactic nucleus.Images of the galaxy in the radio portion of the electromagnetic spectrum show two jets protruding in opposite directions from the galaxy's center. These jets extend many times the width of the portion of the host galaxy which emits radiation at visible wavelengths. At the ends of the jets are two lobes with "hot spots" of more intense radiation at their edges. These hot spots are formed when material from the jets collides with the surrounding intergalactic medium.Cygnus A appears in Carl Sagan's Contact as the result of beings actively creating a galaxy.".
- Cygnus_A thumbnail 3c405.jpg?width=300.
- Cygnus_A wikiPageExternalLink nph-bib_query?1994Natur.367..713H&db_key=AST.
- Cygnus_A wikiPageExternalLink text.
- Cygnus_A wikiPageExternalLink cyga.html.
- Cygnus_A wikiPageExternalLink p7bb.htm.
- Cygnus_A wikiPageExternalLink sim-id.pl?protocol=html&Ident=cygnus+a&NbIdent=1&Radius=10&Radius.unit=arcmin&CooFrame=FK5&CooEpoch=2000&CooEqui=2000&output.max=all&o.catall=on&output.mesdisp=N&Bibyear1=1983&Bibyear2=2005&Frame1=FK5&Frame2=FK4&Frame3=G&Equi1=2000.0&Equi2=1950.0&Equi3=2000.0&Epoch1=2000.0&Epoch2=1950.0&Epoch3=2000.0.
- Cygnus_A wikiPageExternalLink sim-id?protocol=html&Ident=Cygnus+A&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id.
- Cygnus_A wikiPageID "2347254".
- Cygnus_A wikiPageRevisionID "585835645".
- Cygnus_A appmagV "16.22".
- Cygnus_A constellationName Cygnus_(constellation).
- Cygnus_A distLy "600".
- Cygnus_A epoch Epoch_(astronomy).
- Cygnus_A hasPhotoCollection Cygnus_A.
- Cygnus_A name "Cygnus A".
- Cygnus_A names "4".
- Cygnus_A sizeV "0.549".
- Cygnus_A type "E".
- Cygnus_A z "0.056075".
- Cygnus_A subject Category:3C_objects.
- Cygnus_A subject Category:Cygnus_(constellation).
- Cygnus_A subject Category:Quasars.
- Cygnus_A subject Category:Radio_galaxies.
- Cygnus_A type Abstraction100002137.
- Cygnus_A type Collection107951464.
- Cygnus_A type Galaxy108270938.
- Cygnus_A type Group100031264.
- Cygnus_A type RadioGalaxies.
- Cygnus_A type CelestialBody.
- Cygnus_A type Galaxy.
- Cygnus_A type PhysicalBody.
- Cygnus_A comment "Cygnus A (3C 405) is one of the most famous radio galaxies, and among the strongest radio sources in the sky. It was discovered by Grote Reber in 1939. In 1951, Cygnus A, along with Cassiopeia A, and Puppis A were the first "radio stars" identified with an optical source. Of these, Cygnus A became the first radio galaxy; the other two being nebulae inside the Milky Way. In 1953 Roger Jennison and M K Das Gupta showed it to be a double source.".
- Cygnus_A label "Cygnus A".
- Cygnus_A label "Cygnus A".
- Cygnus_A label "Cygnus A".
- Cygnus_A label "Cygnus A".
- Cygnus_A label "Лебедь А".
- Cygnus_A sameAs Cygnus_A.
- Cygnus_A sameAs Cygnus_A.
- Cygnus_A sameAs 백조자리_A_은하.
- Cygnus_A sameAs Cygnus_A.
- Cygnus_A sameAs m.075kd8.
- Cygnus_A sameAs Q1147716.
- Cygnus_A sameAs Q1147716.
- Cygnus_A sameAs Cygnus_A.
- Cygnus_A wasDerivedFrom Cygnus_A?oldid=585835645.
- Cygnus_A depiction 3c405.jpg.
- Cygnus_A isPrimaryTopicOf Cygnus_A.
- Cygnus_A name "4C 40.40, 2E 4309, CYG A, W 57, BWE 1957+4035, NRAO 620, 1C 19.01, QSO B1957+405, 3C 405, 1RXS J195928.7+404405, 3C 405.0, 2U 1957+40, 3CR 405, LEDA 63932, 4U 1957+40, VV2000c J195928.3+404402, DA 500, MCG+07-41-003, DB 117, Mills 19+4, VV 72.".
- Cygnus_A name "Cygnus A".
