Actually modding an invisible star in the center of the system would be really cool. Once I was playing a game, small galaxy, low tech start, anchent quadrant, many other races, and had just destroyed a major enemy on my half of the galaxy. I had secured about 8 systems and I noticed that one of may allies that I had was building up his fleets and was taking the planets that I wanted. He represented my greatest threat so far (He controled about 10 systems). I decided on a preemptive strike and I lead my 3 fleets (a total of 74 ships) of LC, C, and BC through the choke point. I had just 'liberated' four juicy planets in that system. I had mine sweepers with me and I was near the exit W.P. when it happened. I didn't finish looking over the log and I noticed that I couldn't find my attack fleet
After much swearing, I looked through the log carefully and noticed that a star had exploded. It just so happened to be the star in the system that my fleets were in.
They were only in the system for 1-2 turns. I didn't have a real presence in the system until a year or so ago. So I missed the 'start will go nova in 3.0 years' message
After going from 91 to 17 ships (mostly support) my fickle allies decided that they didn't like me anymore and went to war with me, on that same turn. I ended up winning that war. The final insuly of the game was after fighting a long drawn out war with the amero'ke(?) and finally had my fleet of 20 ships parked over their homeworld. I invaded their homeworld and Captured it and demanded their surrender. I had beat them back to their home system and had over 40 ships in the system. They decided that it would be wise to surrender. Needless to say, I was happy with my eliminating the final threat to me. The Last 2 empires were not a threat. As I look through my log a bit more closely, my jaw dropped. It happened again. Their star went nova!
Twice in a game. I couldn't even savor my victory. By the way, for both supernovas none of the races had steller manip to distroy suns (at least I don't see how they could.)
Anyways, back to the point, if you modded it so the giant starts could be blown up then those systems could be used as booby traps. Perhaps hiding a cloaked star killer. Normally this would be dumb because you would destroy the planets. It also would provide some use for those worthless sectors.
Just my lil' story
Scrytub Ka'Lorrith Drakkar
Krintarian Imperium