Thawas soooome hot chilly!

Seriously though, it's great. You lead the eye very well, from the sunburst to the moon to the fire. The only thing I can think to mention is that the light sources seem a little crowded. The explosion is kind of tucked between the bulk of the planet and the bottom of the image, while the "sun" is hidden directly in the upper left corner. In fact, the planet itself seems a bit boxed in, just barely touching three sides of the image.

A rule of thumb my professors drilled into me in art school was to avoid tangents with corners and borders. Putting things in corners seems forced, and objects in the picture need to either be submerged well past the frame or a fair distance from it. I think the composition might be improved if you "backed up" and gave the planet space all around itself, perhaps centering it a bit more, and got that light source away from that nook it's wedged into. It's difficult to even suggest that, though, because it really is a very pleasing effect. So you must be doing more right than wrong.