|Survey type||astronomical catalog|
The astronomer Edward Emerson Barnard compiled a list of dark nebulae known as the Barnard Catalogue of Dark Markings in the Sky, or the Barnard Catalogue for short. The nebulae listed by Barnard have become known as Barnard objects. A 1919 version of the catalogue listed 182 nebulae; by the time of the posthumously published 1927 version, it listed 369.
- Bok, B. J.; McCarthy, C. C. (1974), "Optical data for selected Barnard objects", Astronomical Journal, 79: 42, Bibcode:1974AJ.....79...42B, doi:10.1086/111527.
- Barnard, E. E. (1919), "On the dark markings of the sky, with a catalogue of 182 such objects", Astrophysical Journal, 49: 1–24, Bibcode:1919ApJ....49....1B, doi:10.1086/142439
- Frost, Edwin B.; Calvert, Mary R. (1927), A Photographic Atlas of Selected Regions of the Milky Way, Washington: Carnegie Institution of Washington