Astrophysics (index)about

Cygnus A

(3C 405, QSO B1957+405)
(early-discovered radio galaxy and quasar)

Cygnus A (i.e., 3C 405 or QSO B1957+405) is a radio galaxy and quasar, one of the first of each to be identified. As a radio source, it was discovered by Grote Reber in 1938, with his back-yard radio telescope, the first radio receiver built for that purpose. It demonstrates the involvement of jets in creating a radio galaxy's radio emissions, showing the strong radio single comes from two regions in opposite directions from the galaxy itself.


(galaxy,radio,quasar,jet)
http://en.wikipedia.org/wiki/Cygnus_A
RedshiftParsecs
/Distance
Lightyears
/Lookback Years
  
.056232Mpc757MlyCygnus A

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