KnowraDark nebulaLinked fromLinked fromThe 8 pages that link to Dark nebula, each with the reason it gives.All 8Broader topic 1Narrower topic 3Compared with 4Orion NebulaCompared with: Dark dust lanes cross the bright nebula, contrasting with its glowing gas.Emission nebulaCompared with: It obscures light instead of glowing from ionized gas.NebulaCompared with: Unlike bright emission nebulae, it is seen mainly as a silhouette against background stars.Horsehead 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.Reflection nebulaCompared with: The same dust can obscure background light instead of showing scattered starlight.Coalsack NebulaNarrower topic: The Coalsack is a conspicuous example of this kind of light-blocking cloud.Trifid NebulaBroader topic: Dark dust lanes cut across the bright nebula and create its three-part outline.