The Crab Nebula, Messier1 using Ha and Oiii
Astronomy

The Crab Nebula, Messier1 using Ha and Oiii










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, 130 min Ha, 20 min Oiii, 40 min RGB, ISO1600. Camera Canon 40 D modified, guided, darks, flats.




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Astronomy








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