Mike,
Fantastic work.
I simply love all that intricate detail (pinks) in the (mainly) blue spiral arms.
Unfortunately, I went over my data allowance so can't view the larger version until it is reset. It's OK, though, as I have your heavenly bodies bookmarked -- it's my portal to Mike's world and I visit regularly.
+1 with Louie's comment, though. Anyway, I don't think it detracts too much from the image.
Well done, dude!
Regards,
Humayun