Crab nebula: The crab in action & the case of the dog that did not bark
Monday, May 16, 2011 - 08:30
in Astronomy & Space
A new movie from NASA's Chandra X-ray Observatory shows a sequence of Chandra images of the Crab Nebula, taken over an interval of seven months. Dramatic variations are seen, including the expansion of a ring of X-ray emission around the pulsar (white dot near center) and changes in the knots within this ring.