Wow! Try this interactive piece from Chandra X-ray Observatory:
Blasts From The Past: Historic Supernovas (Interactive Piece), click to enjoy:
Every 50 years or so, a star in our Galaxy blows itself apart in a supernova explosion, one of the most violent events in the Universe. The force of these explosions produces spectacular light shows. Explosions in past millennia have been bright enough to catch the attention of early astronomers hundreds of years before the telescope had been invented.