The visible nebulae belong to a huge complex of gas and dust clouds in the constellation of Cygnus. They are separated by the dark dust cloud Lynds 1630. One or more young stars that are created in the dark dust lanes must illuminate the gas cloud and cause it to glow in the red light of Hydrogen Hα. The most possible candidate for doing that is hidden in Lynds 1630. The gas clouds are 1,800 light years away.