u-bend writes "The Chandra X-ray Observatory has observed an incredibly bright and long-lasting supernova.
From the article:
The brightest stellar explosion ever recorded may be a long-sought new type of supernova, according to observations by NASA's Chandra X-ray Observatory and ground-based optical telescopes. This discovery indicates that violent explosions of extremely massive stars were relatively common in the early universe, and that a similar explosion may be ready to go off in our own galaxy.
A concise Yahoo News version can be found here."