mei 162012
 
A Supernova Cocoon Breakthrough

  Observations with NASA’s Chandra X-ray Observatory have provided the first X-ray evidence of a supernova shock wave breaking through a cocoon of gas surrounding the star that exploded. This discovery may help astronomers understand why some supernovae are much more powerful than others. On November 3, 2010, a supernova was discovered in the galaxy [continue reading]