Re: And you thought Asteroids were a problem.
Well if the star is only visible in either the northern or southern hemisphere, then it will only affect that half of the Earth. If it is visible from the equator, then we're all screwed. Greg Egan wrote a novel called "Diaspora" which was a story about just such an event. But what happens if the galactice core goes supernova? Would that destroy life in neighboring galaxies?