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.

Further reading:
/Lookback Years
.056232Mpc757MlyCygnus A

Referenced by pages:
quasar (QSO)