Definition 1 in Astronomy is: Any luminous cloud-like object in the sky, as a distant star-cluster; any gaseous body of unorganized stellar substance.
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Associations with the noun nebula, Definition 1, are:
Picture of Rosette Nebula, an emission nebula.
emission nebula: One that emits light due to the action of ultraviolet radiation on its gas atoms; as the Trifid Nebula.
Tarantula Nebula:
open clusters: Loose groups of a few thousand young stars that were born in the same cloud and are drifting apart.
globular clusters: Densely packed, roughly spherical groups of hundreds of thousands of older stars.
star cluster: (definition unavailable from the authorized source).
Definition 2 in Meteorology is: Fog or low cloud.
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Associations with the noun nebula, Definition 2, are:
Definition 3 in Pathology is: A speck on the cornea; visual opacity.
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Associations with the noun nebula, Definition 3, are:
nebulae is the plural form.
This link will be to nebulae synonyms, antonyms and etymology.
Within the hierarchical structure, this down link is to star system and this up link is to constellation.
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Last update of this page:
2000 MAR 02 Links to top of page corrected. Pronunciation added.
1999 JUL 20