OK, I'll confess that I've never actually used the Stellar Plasma Sphere to create a star, so maybe this won't work... but IIRC you don't need anything in a sector (storms, nebulas, etc.) to create a star - you can just create one anywhere you want - so just imagine this: You build a ship with a Stellar Plasma Sphere and a repair bay. You also have some of those crystalline solar resource generators in the system. You create one star per turn for who knows how long. You get boodles of resources... Does this seem right???
(Note: it should also work with Solar Collectors to create supplies, but who cares about that when you can generate infinite resources!!!)