I wasn't disagreeing with you on any point I was just discussing that ridiculous bit of science. For example if the largest star known VY Canis Majoris went hypernova tomorrow it wouldn't have the power to destroy a galaxy. Stars this size go hypernova which is equivilant to 100 supernovas. Here is a comparrison picture to scale. At this scale our sun is less than the size of a pixel compared to Canis Majoris' horizon. So no matter the size of the star it wouldn't happen unless it was of mythical proportions. Why they used a supernova as the catalyst for all this I don't get. Still love the movie, though.