Space Print from NASA: Crab Nebula. This mosaic image, one of the largest ever taken by NASA's Hubble Space Telescope of the Crab Nebula, is a six-light-year-wide expanding remnant of a star's supernova explosion. Japanese and Chinese astronomers witnessed this violent event nearly 1,000 years ago in 1054, as did, almost certainly, Native Americans (NASA Media Archives). Buy this picture as an unframed print or poster, a framed print or a mounted box canvas print.