No, a nearby supernova won’t wipe us out | Bad Astronomy | Discover Magazine
A Type Ia does put out more high-energy radiation than a Type II supernova, which is caused when a massive star’s core collapses and the outer layers are ejected. That’s what most people think of when they hear about a supernova. Those have to be really close to hurt us, certainly closer than 25 light years. But even with their added power, a Type Ia just doesn’t have the oomph needed to destroy our ozone layer (as the press release indicates) from 3300 light years away. It would have to be far closer than that.
Unless it was the Hobus supernova! What classification is that?