Glossary term: Dark Nebula

Description: A dark nebula is a cool cloud of gas and dust in space which blocks much of the light from stars and bright nebulae behind it, and therefore appears dark. It is the dust which blocks the light from behind, even though dust makes up only 1% of the matter in the nebula. Dark nebulae block visible and ultraviolet light, but it is possible to see through them by looking in infrared light. The best-known example is the Horsehead Nebula in the constellation of Orion.

Related Terms:

See this term in other languages

Term and definition status: This term and its definition have been approved by a research astronomer and a teacher

The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".