Using a mix of DoGA/PSP7/Paint and sometimes Photoshop.
The symbols were a inverse reflection and seem to be scaled down/up regardless of the size of the original bitmap to a set size, so the burst symbol (the one you saw) was 250x250.bmp. I tried to make a bunch of cool symbols at 600X600 and it shrank it down to even smaller than the 250x250 image. So I went the other direction and made a 128x128 one hoping it would increase the size. No luck, it was still the same upon import as a reflection. I'm rethinking my logic on this one and I might just make the symbols into a texture map instead with a blank background.
I'll do the goo tomorrow, with today being V-Day I won't have anytime tonight - I hope
PD:
I asked my friend that does space scenes to give it a shot.