As illogical as this is astronomically speaking, I love the look of that galaxy. That said, the stars' outward dissipation from the core is a bit too pronounced for my taste, and it could be done a bit more smoothly, although it's probably what you had in mind.
Light on the planet (white) does not match the one from the galaxy and lighting of the star and all over the picture (orange/yellow/red). A little bit seems like the planet not from here. Also, on such distance if we see the star of this system (if I clearly understand, it is at the bottom center), it must be far more bright than other background, almost white in the center and must have stronger crown around (even if it red dying star).
thanks for the constructive comment,the problem in here as you said may be the scale, the lighting I'm guessing would be almost all from the star rather than the galaxy (too far away), though in space art sometimes we forgot these things.
thanks for the tips, I don't know if I can make the changes in this piece so it still looks good, but I'll definitely have it in consideration for future work.