Surprises from Kepler's supernova
According to the latest observations of NASA's Chandra telescope, the supernova observed for the first time in 1604 by Kepler was not only more powerful, but might have also occurred at a greater distance, than previously thought. Astronomers have long studied the Kepler supernova remnant and tried to determine exactly what happened when the star exploded to create it. New analysis of a long observation from NASA's Chandra X-ray Observatory is providing more clues.
Read the full story here: http://www.media.inaf.it/2012/09/13/la-supernova-di-keplero-sorprende-ancora/