The “Crab Nebula” reveals its complex structure and evolution in this image and animation made by Gianluca Masi. We share here a detailed image of the famous “Crab Nebula” (Messier 1), likely the most famous supernova remnant in our Milky Way. We also show how it expanded in almost 20 years. The image above comes from the sigma clipping combination of 13, 300-s... [1652 chars]