Scientists have observed the biggest supernova – stellar explosion – ever detected, the violent death of a huge star up to 100 times more massive than our sun in a faraway galaxy. The supernova, releasing twice as much energy as any other stellar explosion observed to date, occurred about 4.6 billion light years from Earth in a relatively small galaxy, scientists said. It might represent, they added, a type of supernova that until now has only been theorized.
