Oh absolutely, I enjoy writing about this stuff, let's just hope it's coherent!
So there are three main parts to the graphic, the soft white sun circle, a layer of fat rays, and a layer of very skinny rays. Both are from a "Rising Sun" brush I used.
The soft white circle is two layers, a bottom, very very soft and less opacity airbrushed circle, and above it a smaller, slightly harder and higher opacity circle. So it sort of has a glow.
Now the rays weren't necessarily hard, but a lot of playing around with certain tools. They started off as hard-edged white lines. So first things first I hit up the Gaussian blur and softened them up a lot.
Now I wanted to break up the symmetry of the lines. To do this I added an opacity mask to the rays, and took an extremely soft, large black airbrush, and started going around the edges so it all faded out, then I would just come in on one side harder than the other to get rid of the symmetry. You may notice my thick rays are way heavier on the right side.
I did that with both sets of rays, but I tried to have the skinny rays be a little more prominent, so I didn't completely take them away from one side. I also made them a bit brighter than the thick rays, but I used a harder guasian blur on them.
So in a nutshell, it was just all of collection of playing with opacity masks, levels, and gaussian blurs.