diffuse nebula

(redirected from Diffuse nebulae)
Also found in: Dictionary, Thesaurus.

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.
References in periodicals archive ?
While an image intensifier makes diffuse nebulae appear brighter, it also amplifies the sky's brightness and thus does not usually change the contrast.
Among the best are the spiral galaxies M51 and M104, the globular star cluster M13, and the diffuse nebulae M42 and M27.
Much of the emitted light shines in the red portion of the visible spectrum, so diffuse nebulae appear predominantly red on color photographs.
By a very imperfect analogy, we could coin the term "uranome" to describe a region of the heavens with a concentration of a certain type of celestial object - diffuse nebulae, say, or globular clusters, or galaxies, as in the Coma-Virgo "Realm of the Galaxies.
More importantly, Super G 800 has superb sensitivity to both red and blue deep-sky objects, and it does an excellent job of recording the green emission line of doubly ionized oxygen that is prominent in planetary and diffuse nebulae.
In 14 guided tours, MacRobert leads us to discover how many interesting multiple stars, diffuse nebulae, open and globular clusters, and just plain intriguing star patterns can be found in relatively small areas of the sky.

Full browser ?