The one thing that just shattered my sense of immsersion about this movie was the reason that spock did all of what he did:
How is it that one supernova can cause an explosion so massive that it will destroy the the entire galaxy?
That must have been a HUGE star. Even so, SOMEONE's scientisis should have gone "Oh crap! If this star goes supernova, it will destroy the galaxy. We need to study it, and keep it going, or figure out a way to destabilize it in a safer manner than a supernova"