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.
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