A crab walks through time - this new composite image of the Crab Nebula uses data from our Hubble (NASAHubble), Chandra (chandraxray) and Spitzer space telescopes and gives new insights to this celestial object. We've learned a lot over the years about this intriguing exploded star and its pulsating core. It was one of the first objects that our Chandra X-Ray Observatory examined with its sharp X-ray vision, and it has been a frequent target of the telescope ever since. There are many reasons that the Crab Nebula is such a well-studied object. For example, it is one of a handful of cases where there is strong historical evidence for when the star exploded. Having this definitive timeline helps astronomers understand the details of the explosion and its aftermath. In the case of the Crab, observers in several countries reported the appearance of a “new star” in 1054 A.D. in the direction of the constellation Taurus. Much has been learned about the Crab in the centuries since then. Tod...