Observations of Cygnus A Radio Galaxy

Early image of Cygnus A (Morgan Matthews and Schmidt 1964 ApJ 140 35 -- taken from Keel's notes) with the location of the radio lobes shown.

 

More recent optical and radio image of the Cygnus A region, with an HST closeup of the nuclear regions clearly showing a dusty post-merger.

 

  Optical spectrum of Cygnus A (from Osterbrock 1983 PASP 95 12) -- the classic NLRG (Narrow Line Radio Galaxy) spectrum.