Coalsack Hear it!

Coalsack definition

Coal·sack (kōl′sak′)

noun

Astron. a prominent dark nebula in the Milky Way near the constellation Crux: usually with the
sometimes written Coal Sack

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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