Great work mate, Ill agree with mark that it is a tad on the yellow. maybe decrese the red by a smidge in curves so you can keep your nice star colours, and increse a little in the lower end of the curve with blues not much but just enough to tame the yellow.
Another tip would be to do some zone noise control using layer masking techniques. You have great SNR in the core, but like we all suffer the dim zone has some nasty noise.
You could layer in a Reveal all gaussian blur for the back ground, then use your brush to bring the unblurred core thus retaining your nice SNR+Detail and subtracting the parts you don't want people to look at.
its a photo guide your subjects to the spot you want them to see first.!
You could also use a Synthetic lumenence they are great for bringing forward some really nice details.
