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Active Galaxy Cool Fact

Active Galaxies

Cygnus A is one of the brightest radio sources in the sky. However, the galaxy itself is merely a tiny dot between two huge radio-emitting clouds that it has blasted out into space.

The image on the left is the active galaxy Cygnus A in optical light. The image on the right is Cyg A in the radio band. One of the strongest radio sources in the sky, the galaxy itself is the tiny dot between the two huge lobes which have been blasted out into space.

Optical Cyg A Radio Cyg A


A service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA/GSFC

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