* Astronomy

Just to the north of Deneb, halfway between Deneb and Herschel's Garnet Star, is the dark nebula Le Gentil 3, or Globular Filament 7 (GF 7, catalogued by Schneider & Elmegreen in 1979). 
Le Gentil 3 was discovered and catalogued by the French astronomer Guillaume-Joseph-Hyacinthe-Jean-Baptiste Le Gentil de la Galaziere in the 1700s.
The dark nebula stretching over six degrees in the sky is visible to the unaided eye from a dark-sky site.

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See Blobs Cygnus highlights
Google earth file: Cygnus highlights.kmz (10kb, kmz)