A supernova more than twice as bright as others of its type has been observed, suggesting it arose from a star that managed to grow more massive than theoretically predicted.

Why is this big news? Well, whatever the safe distance (in light years) from a supernova used to be, you can now half it. Or more. If they have found one that is twice as bright, you can guarantee that one 10x as bright will occur somewhere in the Universe

Source: New Scientist