Astrophysics (index)

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.

/Lookback Years
.056232Mpc757MlyCygnus A