Dawn from Space

My first space-scape. I found a tutorial here on DA on how to render planets in Photoshop. I'm not looking for critique on this--it's just something done to try out blending modes, and I think it turned out okay--a lot different from my usual work, I'm not used to using filters. I sort of know what I would like to do to improve it, but it's not my cup of tea. It reminds me of the trailer for the Hitchhiker's Guide movie, minus the words DON'T PANIC across the image, in bright blue glowing text. ^_^