KnowraDark nebulaLinked fromLinked fromThe 8 pages that link to Dark nebula, each with the reason it gives.All 8Broader topic 1Narrower topic 3Compared with 4Horsehead NebulaNarrower topic: The Horsehead's silhouette is the defining appearance of a dark nebula.Bok globuleNarrower topic: Bok globules are compact examples of dark nebulae.Coalsack NebulaNarrower topic: The Coalsack is a conspicuous example of this kind of light-blocking cloud.