Cygnus Without Stars 4.4

For this week, I chose to do the picture of a 12 degree view of northern Cygnus, using a filter that transmits only red light emitted by hydrogen atoms (An h-alpha filter). The picture has clouds of cosmic hydrogen gas, and most of the stars have been removed by digital processing. However, we can see Deneb because it is so bright, and also visible are the North America, Pelican, Butterfly, and Crescent Nebulae.