absorption nebula


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Related to absorption nebula: emission nebula, Reflection nebula, Molecular clouds

absorption nebula

n.
A cloud of interstellar gas and dust that absorbs most or all of the light from luminous objects like stars behind it, appearing as an irregular dark patch. Some absorption nebulae, such as the Coalsack, are visible to the naked eye. Also called Bok globule, dark cloud, dark nebula.
References in periodicals archive ?
A fairly prominent absorption nebula lies about 3' north-northeast of the 7th-magnitude star HD 164816.