I'm no artist myself, but I like this picture a lot. The large, smooth curves really accentuate the sheer scale of what you're trying to portray, yet the soft gold color you chose makes the whole thing seem more peaceful rather than imposing.
The only criticism I have is that the top half of the picture (technically the background) seems to be lacking in comparison-to me, it just seems...too empty, a bit off. Relatively static/dull compared to the incredibly gorgeous nebula/thing.
Still, all in all, a great picture and an instant fave.