diffuse nebula

(redirected from gaseous nebula)
Also found in: Dictionary, Thesaurus, Wikipedia.
Related to gaseous nebula: nebulous stars

diffuse nebula

[də′fyüs ′neb·yə·lə]
(astronomy)
A type of nebula ranging from huge masses presenting relatively high surface brightness down to faint, milky structures that are detectable only with long exposures and special filters; may contain both dust and gas or may be purely gaseous.