The Supernovae That Burn at the Center and the Edges of Everything

From Earth, the Pinwheel Galaxy looks to us like just a pinprick of light in the Big Dipper. But it's an enormous galaxy that's twice the size of our own. And in this new image of the galaxy from NASA, you can see that the Pinwheel is bursting with supernovae — the purple regions in this image highlight areas of… »5/25/12 5:30pm5/25/12 5:30pm