Caldwell 9, also known as the Cave Nebula or Sharpless 2-155, is an emission nebula in the constellation Cepheus, associated with the young open cluster NGC 7380 nearby. It lies roughly 2,400 to 3,000 light-years from Earth and takes its popular name from dark dust lanes that carve a cave-like opening into its glowing hydrogen gas.
Facts
Classification
Constellation CatalogueNew General Catalogue (NGC) 1 Discovery Year In the Other Atlases
In Constellation
Also in Divinity Atlas: the constellation this subject lies in.
Sources
1. Wikipedia (space and spaceflight articles)
Wikimedia Foundation
2. Caldwell 9 (Wikipedia)
Article text: discovery
Sh 2-155 was first noted as a galactic emission nebula in 1959
In Group: Emission, Reflection and Diffuse Nebulae, Lead sentence
Sh 2-155 (also designated Caldwell 9, Sharpless 155 or S155, or LBN529) is a diffuse nebula in the constellation Cepheus, within a larger nebula complex containing emission, reflection, and dark nebulosity.
View the SourceWikidata: Caldwell 9
Wikidata Q859146, class allow-list match (w-wdresolver-0926)View the Source Sh 2-155 (Wikipedia)
Caldwell 9, Wikipedia - lead section, catalogue classification
Sh 2-155 (also designated Caldwell 9, Sharpless 155 or S155, or LBN529) is a diffuse nebula in the constellation Cepheus, within a larger nebula complex containing emission, reflection, and dark nebulosity.
Sh 2-155, Wikipedia - lead section, constellation
Sh 2-155 (also designated Caldwell 9, Sharpless 155 or S155, or LBN529) is a diffuse nebula in the constellation Cepheus, within a larger nebula complex containing emission, reflection, and dark nebulosity.
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