Hmmm. [he says, quirking an eyebrow in consideration] Could a supernova propogate through a subspace corridor?
... No. That wouldn't make sense. The way they managed to destroy subspace nodes has been to have a powerful explosion inside them. Therefore, a supernova explosion propagating through a node would cause it to collapse. Maybe some of the explosion would leak through, but surely not enough to be more than a suped-up nuclear explosion. Nothing big enough to threaten a planet, let alone a star system.
... wait a minute. I see where you are going with that.
Whoa. Creepy thought, that. But how would those Sathani get out of the Sol system once they had wiped out whatever Terrans and Vasudans were left in the system? Blow up Sol?