Basically a nice shot Russ. A few possible improvements would be to get more colour into the galaxy which has a bluish hue with some red Ha patches and a yellowish core, some colour into the stars and to repair the star elongation from the tracking errors.
Star repair:
1. make a duplicate layer
2. set it to darken mode
3. lasso the galaxy and select invert so everything except the lassoed galaxy is selected.
4. filter/other/offset
5 adjust horizontal and vertical numbers until you get more round stars.
6. You can enter then edit/fade to reduce the effect for fine tuning as the offset filter only takes whole numbers.
Now select the stars and increase the colour saturation. Use the colour range tool to select out the stars only.
Then use colour balance tool to bring up the overall colours of the galaxy or if that is affecting the stars too much then use the sponge tool, set to saturate 5% and rub it on the galaxy only.
A bit of smart sharpening on the galaxy only (lasso it first and feather 25 pixels) - not too much should polish it off.
Cheers,
Greg.
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