 The Nebula is part of a much larger nebula that is known as the Orion Molecular Cloud Complex . The Orion Molecular Cloud Complex extends throughout the constellation of Orion and includes Barnard 's Loop , the Horsehead Nebula , M43 , <unk> , and the Flame Nebula . Stars are forming throughout the entire Cloud Complex , but most of the young stars are concentrated in dense clusters like the one illuminating the Orion Nebula . 
