Abell 1656 Galaxy Cluster in Coma Berenices

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Abell Cluster 1656 in  Coma Berenices

Many 15th and 16th magnitude galaxies in this image

5 1/2 hours total exposure (11 x 30 minutes)

AP155EDF/ST7E @-25deg C.


Backyard in Castro Valley, Ca.

Contained within Abell Cluster 1656 is the supergiant elliptical galaxy, NGC4889 which is approximately 400million light-years distant. It has the luminosity of about 330 billion Suns. Its major axis is about 330,000 light-years long. It is believed  that NGC4889 got so big by absorbing nearby galaxies. Other galaxies in this cluster are mostly within a 100million light-year range of NGC4889.