Great Wall of Cygnus
Perhaps discovered by William Herschel on October 24, 1786. Discovered by John Herschel before 1833.
Image: Nick Pavelchak Info
This nebula is lying 3 degrees from bright Deneb, Alpha Cygni. Some people claim it may be visible to the naked eye under good, dark conditions, and a preferred object for amateur astrophotographers.
The distance to the North America Nebula is estimated at 1,600 light years. The North America Nebula was perhaps detected by William Herschel who cataloged a “faint, extremely large, diffuse nebulosity” near its place under his catalog number H V.37. John Herschel definitely found it and cataloged it as h 2096 and later as GC 4621. It was first photographed by Max Wolf on December 12, 1890.