absorption nebula

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Related to absorption nebulae: Reflection nebula, emission 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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
The Millennium Star Atlas (MSA), unfortunately out-of-print, has long been my favorite guide for hunting these absorption nebulae. I find that the dark nebulae boundaries on MSA charts are usually quite accurate.
Lindroos (Stockholm Observatory) as part of their study of formaldehyde in dark dust clouds, lists 42 absorption nebulae detected in the Whiteoak fields.
Sometimes called absorption nebulae, they range from small black voids a few arc-minutes across to the Great Rift stretching more than 120 [degrees] from Deneb to Alpha Centauri.