First of all, I appologize for publishing basically the same data that I have twice in the past.  But given my low throughput compared to most on this site, I am sure I am not stressing the AstroBin data center by any means!  And this image just doesn't work with the low resolution that simple revisions yield here. 

This project is something that I have been wanting to do for some time.  Being one of the deepest images that I had taken with my RASA 11, I have always been more enamored with the many background galaxies, their color and their patterns of layout on the backdrop of the Universe that I wanted to do something that showed me the true scope of the data without the interfering Milky Way stars.  I have done a number of such images over the last 4 months, so this is a continuation of my Assault On Stars Series!  Revision H will take you to a lower resolution of the original, full starred version of the field so you do not have to go back to the original post.  Revision B is the mouse-over image, which I will discuss below.  This new version, though maybe not as catchy as the starred version (which I still like for the dynamic range and color added by the stars and of course LoTr 5 (PK339+88.1), has a story to tell in processing, though I will not tell it in full here.  At least 4 solid days of restoring the damage done by the inevitable damage done by automated star removal.  Much cross checking the GAIA and NED databases to try to be as accurate in the removal of stars and the inclusion of all galaxies that I detected in my data.  Unfortunately, the catalogs (at least as shown via Aladin) seemed particularly incomplete for more than half of the field shown here.  And even the saturation bombed region by NED was also obviously incomplete.  So certainly some stars squeaked by my best efforts and certainly I probably deleted some galactic smudges.  In fact I know that I certainly lost many of the Quasi Stellar Objects.  As their names suggest, they kind of look like stars and fell to my hand, mostly!  I was thinking of adding them back, but found their relative rarity made that visually useless.  I tried to use a very light hand on the XXT suite of PI functions so as to not damage some of the larger, more extended distant galaxies in order to preserve some sense of size relationships in these 2-6 billion light year distant galactic assemblages.  Especially, which giant galaxies are the dominant galaxies within their cluster.  But even a light hand at these tools still did some unwanted things to some of the brighter small smudges.  Hopefully the full picture here is what is most important to you!

The mouse-over includes my annotations (in red) outlining some of the more dominant galactic clusters in this region.  Some are so evident that they even, almost, stood out in the starred version!  I outlined these to show you the regions I used to analyse the distance of the galaxies roughly within the red circles.  (Edit: Also see Revision I for an example of the field data that I used to do the work.) The numbers nearby each circle is a rough high end average of the distance of the galaxies in billions of light years for the group.  Those that had their red shifts posted through Aladin.  All of these "clusters" held pretty consistent distances with the exception of the largest one furthest to the right.  I believe that the smaller ones, which have a consistent distance for its members are true clusters.  The exception, the large group, is likely not, but rather an assemblage of smaller clusters with some much more distant galaxies behind those clusters.  However, the distant galaxies in the large group are not themselves clustered, but random throughout the circled region.  I assume that these outliers are just standout, large luminous galaxies, roughly three times the distance as those foreground galaxies at 2.2 billion ly!  Not all the galaxies listed within these regions are so identified by NED or Simbad or have red shift determinations.  Nor does my image show some of the most distant galaxies.  But I found a number of galaxies in the 5 to 6 billion ly range that I can see.

However, I feel without the stars, the real impact is that these "clusters" reveal themselves to really just be nodes along the galactic web.  I believe that this starts to become evident in this image.  We do see denser galactic neighborhoods, but also, what appears to be voids, roughly circular that highlight the connections between the nodes.  So I think the best view of this is the unmolested image without annotations.  The field of view here is too small to detect the large voids typically presented to us from the large survey computer-generated simulation from the pros.  But I think that the smaller voids seen here are also real.  Speaking of pros, here is a reference that includes a recent updated survey of galaxy clusters (some of whom are seen here) being studied currently.  Lots of value regarding such issues such as dark matter, gravitational lensing, galactic structure dynamics, etc.  Reference: THE REDMAPPER GALAXY CLUSTER CATALOG FROM DES SCIENCE VERIFICATION DATA - IOPscience  RedMaPPer is a data analysis algorithm published in 2014 by a consortium to use various data sources to ID these clusters and universe-wide structure.  As a non-pro astronomer, I find the expanded wording that led to the REDMAPPER acronym funny.  As written: "red-sequence matched-filter Probabalistic Percolation cluster finder."  No doubt the meaing is far deeper than I can imagine.  But as I sit here, sipping my coffee (well perked!), all I needed to do to see these clusters was to get rid of the damn foreground stars!