G'day Rex,
Here is what I did to your image.
First reduced the saturation of the red... Pic 1
Then with a brush removed this adjustment on the galaxy... Pic 2
I then lifted the blue level of the image... Pic 3
Which made sky a bit to blue so I removed this adjustment where it wasn't needed... Pic four
I then lifted the exposure, dropped the highlights and added some definition to bring out the galaxy arms a bit more... Pic 5
Then brushed in some contrast to darken the sky a bit... Pic 6
And then your
... Pic 7
Please note, I really don't know what I'm doing as I'm still trying to get my head around processing myself, there are probably much better ways of doing this
Cheers
Jo