[MaxKaladin]

You don't have to build a star in the center of the system. I found this our when I was trying to figure out how to make stars (I've only had the game for a couple of weeks). I would pop into a system, make a star thinking I needed to be WAY away from the middle because, after all, a STAR is going off. That's a heck of a boom! Well, I got nothing and couldn't figure out why. Finally, I realized I was creating them in the same sector as my warp point and they were being hidden under the warp point graphic so I didn't see them right away.

Anyway, I figured out what I needed to know about where I could build stars and now have four sphereworlds in my empire. Frankly, I see little use for these things because they take so much technology that it seems like the game will be all but won by the time you have one. But, perhaps I'm wrong.