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Galaxy 3C 75

A pair of two galaxies here, in the center of galaxy cluster Abell 400, is melting to become a giant elliptic galaxy. Two supermassive black holes, once the centers of the progenitor galaxies, in a distance of 25 000 light-years now orbit each other. Thereby they emit strong x-ray and radio waves and eject three long jets.

Constellation: Cetus
Distance: 300 million light-years
Visual magnitude: 13.39
Type: E

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04/13/2006

     3C 75
The x-radiation is shown in blue, the radio in pink. In the middle the two black holes can be seen.
Photo:
X-Ray: NASA / CXC / D.Hudson, T.Reiprich et al. (AIfA);
Radio: NRAO / VLA/ NRL
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