CalTech astronomers at the Palomar Observatory discovered a supernova, 21 million light-years away in the Pinwheel Galaxy, in the Ursa Major constellation, shortly after it exploded.
Dont rush out into your backyard just yet, it’s magnitude 15 right now. But the good news is that it’s getting brigher (it was a 20.somethign when first discovered). It’s expected to be visible with a 6″ telescope in a site reasonably free of light pollution within a week or two. If you can pick out the pinwheel galaxy, you’ll probably be able to spot this supernova.