Cygnus-A-DATA:

https://sites.google.com/view/cygnus-a/

https://sites.google.com/view/cygnus-a/distance

https://sites.google.com/view/cygnus-a/distance/20-471

[ https://en.wikipedia.org/wiki/Cygnus_A ]

Cygnus A

[ ... ]

Distance 756.000.000 ly (232 Mpc)

Kommentar:

Andre opgiver afstanden til blot 750 millioner lysår