dark nebula

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Related to Dark nebulae: Emission nebulae, Reflection nebulae

dark nebula

dark nebula

n
(Astronomy) a type of nebula that is observed by its blocking of radiation from other sources. See nebula
References in periodicals archive ?
Many of the prominent stars and bright and dark nebulae in Orion are associated with the pulse of star formation that's going on there right now.
These dark nebulae are usually seen as silhouettes against a brighter background.
Barnard catalogued it as B33 in his list of dark nebulae published in a 1919 paper in the Astrophysical Journal, where he notes 'Dark mass, diam 4', on nebulous strip extending south from zeta Orionis'.
Several dark nebulae can be seen in the constellation, but as we know by now, light pollution stops us from seeing many wonderful objects, which can be found only in ideal dark star-filled night sky conditions.
Indeed, the bright, compact, red objects seen in some of these infrared dark clouds mark the locations of dust cocoons warmed by the light of newborn stars enshrouded in these dark nebulae.
The gases and dust that crisscross the Trifid Nebula make up the third kind of nebula in this cosmic cloud, known as dark nebulae, courtesy of their light-obscuring effects.
The finest dark nebulae for telescopes are those that are silhouetted against a bright background, such as the striking, chevron-shaped dark lane within the high surface brightness Carina Nebula, or those silhouetted against the Milky Way's brightest star clouds.
Of course when looking at objects in the Milky Way, these are mostly fairly close, and there are a wide range of objects to be seen with a telescope--planetary nebulae, bright nebulae, dark nebulae and supernova remnants, and here are just a few suggestions of objects to look at in these categories.
The constellation Chamaeleon is also home to a dark nebula which has been listed as Sa 156 in Sandqvist's Catalogue of Dark Nebulae, published in 1977.
These are the dark nebulae Barnard 92 and Barnard 93--thick dust clouds that block the light of stars lying behind them.
Aboriginal Australians imagined this region's dark nebulae as an emu, with the Coal Sack as its head.