Nice image Mark. Below the galaxy at the bottom right is a tidal stream.
You can just see it in your image. That could be enhanced to bring it up and is worth it.
I imaged this myself over 2 nights but its too low and dim and the resulting image wasn't good enough so I didn't publish it. Yours is better.
I may be just this laptop's monitor which seems to highlight background noise but I can see some green background noise in your image (is this my monitor?)
Did you use flats, the noise seems to follow a vignetting pattern? Nice score with getting an AP130.
Photoshop CS5 has a more automated HDR routine by the way.
Greg.
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