List Of Largest Known Nebulae on:
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Below is a list of the largest
Below is a list of the largest nebula
A nebula ('cloud' or 'fog' in Latin; pl. nebulae, nebulæ or nebulas) is a distinct luminescent part of interstellar medium, which can consist of ionized, neutral or molecular hydrogen and also cosmic dust. Nebulae are often star-forming regio ...
e so far discovered, ordered by actual size (not angular diameter
The angular diameter, angular size, apparent diameter, or apparent size is an angular distance describing how large a sphere or circle appears from a given point of view. In the vision sciences, it is called the visual angle, and in optics, it is ...
). This list is prone to change because of inconsistencies between studies, the great distances of nebulae from our stellar neighbourhood, and the constant refinement of technology and engineering. Nebulae have no standardized boundaries, so the measurements are subject to revision. Lastly, scientists are still defining the features and parameters of nebulae. Because of these rapid developments and adjustments, this list might be unreliable.
List
By angular diameter
See also
*List of largest cosmic structures
This is a list of the largest cosmic structures so far discovered. The unit of measurement used is the light-year (distance traveled by light in one Julian year; approximately 9.46 trillion kilometres).
This list includes superclusters, galaxy ...
*List of largest known stars
Below are lists of the largest stars currently known, ordered by radius and separated into categories by galaxy. The unit of measurement used is the radius of the Sun (approximately ).
The angular diameters of stars can be measured directly us ...
*List of largest planets
Below is a list of the largest exoplanets so far discovered, in terms of physical size, ordered by radius.
Caveats
This list of extrasolar objects may and will change over time because of inconsistency between journals, different methods used ...
*List of most massive stars
This is a list of the most massive stars that have been discovered, in solar masses ().
Uncertainties and caveats
Most of the masses listed below are contested and, being the subject of current research, remain under review and subject to consta ...
*List of most massive black holes
This is an ordered list of the most massive black holes so far discovered (and probable candidates), measured in units of solar masses (), approximately .
Introduction
A supermassive black hole (SMBH) is an extremely large black hole, on the ...
* List of largest galaxies
Notes
References
{{Nebula Largest Nebulae, Largest