Crab Nebula: 50 Years of Expansion

Walter Baate’s 1950 photo of the Crab Nebula is compared with a recent photo (c. 2000), revealing the rapid and continuing expansion of the debris. UPDATE: Dear Kind Viewer -- This video was originally posted as a test and I expected a few friends at most to view it. It was not intended to be a serious attempt at video making, nor was it expected to garner the attention of several thousand viewers. If you are disappointed by the bland delivery of what is actually quite fascinating information, I completely