did you know that Yahoo 'how it works' has an article about the 2 death stars?
O, and the 'death star' seen in the end of ROTS isnt the first death star, or even Qwi xux's prototype. It is actually the start of the geonesian's model being built, captured after the fall of the seperatists. I have several sources that cite this, the yahoo article being on of them. The article has some links to pretty neat articles like what happened to endor after the second death star was destroyed.