M1, The Crab Nebula is positioned just Northwest of zeta Tauri, with a size of about 6 arc minutes. The nebula has lots of stripes spreading outward visible with larger telescopes, this figure gives the name. The distance is about 7200 light years. The Crab Nebula is a remnant of a supernova, exploded in July 1054. Chinese and Japanese astronomers(?) recorded this event in the ancient literary works. The exploded star, that produced the nebula, brightened up with the visual magnitude of about -5, bright enough to be seen in the daytime for nearly a month. Now, astronomers have discovered a neutron star, an optical pulsar in the center of the nebula.