Universe images by Knut

The nebula was first observed by John Bevis in 1731, and corresponds to a bright supernova recorded by Chinese and Arab astronomers in 1054. About 6500 LY from us and 11 LY across. It is called the Crab Nebula here imaged in a Ha, Oiii and RGB sandwich.
CPC11, 2000 mm with f 6,3. About 3 hours exposure time, 190 min, ISO1600 without filter. Camera Canon 40 D modified, guided, darks, flats
January 11 2010. Link til bildet: https://skaarpictures.com/iGalerieAstro/?q=item/3-crabnebula-messier1-m1 CrabNebulaM1_-04Xc2.jpg