This misshapen blotch was once the brightest supernova ever recorded

In the spring of the year 1006, Earth's sky was drastically altered by the appearance of a supernova that was brighter than the entire combined night sky. Mentioned in historical records throughout Europe, Asia, Africa, and North America, this supernova was likely bright enough to be visible during daylight hours,… » 4/28/13 2:00pm 4/28/13 2:00pm