[Taz-in-Space]

I just ran into a little trouble in a recent game where I lost an important strategic system to a
what I believe was a nova... The system in question was of course destroyed, with only asteroid fields left.
question #1: since the system doesn't have a star, the planet maker I built will not change the asteroids into planets - is there any way to rebuild systems without suns in them?
question #2: the system that was destroyed had a few huge planets with moons around them - one of them now shows 3 huge-sized asteroid fields
in one sector; is this common or a fluke?

Bye the way, I was well on my way to winning the game until this happened (my #2 system!) ... now the challenge is back!