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Cluster of galaxies in Coma Berenices.  One of the densest clusters known, it contains thousands of galaxies.  Almost all the objects in this image is a galaxy, each with billions of stars.  Most of the galaxies in the cluster are ellipticals.  Located about 370 mln light years away.  A Chandra X-ray telescope image shows the cluster enveloped by a vast 100 mln deg C gas cloud 1.5 mln light years across.

 

Image info

Telescope:  Skywatcher 8" f/5 Newtonian

Focus:  Prime focus

Camera:  SAC7B, uncooled

Exposure:  170 x 25s 

Date:  3rd April 2003

Processing:  Acquired in K3CCDTools as AVI.  Stacked in Iris.  YRGB image, composited in Photoshop.  Colour enhanced using Multiple Luminance Layering.

Comments

Processed using the YRGB technique.   I managed to end up with 170 frames used in the final image.  This is an unusually high number but still I had very bad diagonal banding on the stacked image.  The banding was removed using wavelets in Iris, but this left a somewhat soft image.  This is the stacked luminosity image.

   
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