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The following is an incomplete list of known planetary nebulae. Image Name Messier Catalogue [a] NGC [a] Other designation [a] Date discovered [a] Distance [a] [b]
The following articles contain lists of nebulae: List of dark nebulae; List of diffuse nebulae; List of planetary nebulae; List of protoplanetary nebulae;
In his study of nebulae on the Palomar Sky Survey plates in 1959, American astronomer Stewart Sharpless realised that the North America Nebula is part of the same interstellar cloud of ionized hydrogen (H II region) as the Pelican Nebula, separated by a dark band of dust, and listed the two nebulae together in his second list of 313 bright ...
The nebulae listed by Barnard have become known as Barnard objects. [2] A 1919 version of the catalogue listed 182 nebulae; [3] by the time of the posthumously published 1927 version, it listed 369. [4]
The Sharpless catalog is a list of 313 H II regions (emission nebulae) intended to be comprehensive north of declination −27°. (It does include some nebulae south of that declination as well.) (It does include some nebulae south of that declination as well.)
Pages in category "Lists of nebulae" The following 7 pages are in this category, out of 7 total. This list may not reflect recent changes. ...
Bar — Barkhatova (open star clusters) (for example: Barkhatova 1, NNW of NGC 7000; the North America Nebula in Cygnus) BAR — E.E. Barton (double stars) Bas — Basel (open star clusters) (for example: Basel 1 at about one degree WNW of open star cluster Messier 11 in Scutum) (Basel 1 is also known as the Apriamashvili cluster)
Caldwell advocates, however, see the catalog as a useful list of some of the brightest and best known non-Messier deep-sky objects. Thus, advocates dismiss any "controversy" as being fabricated by older amateurs simply not able or willing to memorize the new designations despite every telescope database using the Caldwell IDs as the primary ...