Astronomers have spotted "the supernova of a generation," and it's exploding right now

Astronomers are calling a supernova first sighted just two days ago an "Instant Cosmic Classic." Not only is the supernova brighter and closer to Earth (around 21 million light-years) than any we've observed in a generation, scientists actually managed to catch the supernova within hours of its explosion, making it… »8/26/11 4:00pm8/26/11 4:00pm