dark-nebula

dark nebula

noun Astronomy.
a cloud of interstellar gas and dust that absorbs and thus obscures the light from stars behind it, appearing as a dark patch in front of a bright nebula or in an otherwise bright area of sky.
Also called absorption nebula.


Origin:
1930–35

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World English Dictionary
dark nebula
 
n
See nebula a type of nebula that is observed by its blocking of radiation from other sources

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
dark nebula  
See absorption nebula.
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