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- Q1050934 subject Q8363431.
- Q1050934 abstract "The Elephant's Trunk nebula is a concentration of interstellar gas and dust within the much larger ionized gas region IC 1396 located in the constellation Cepheus about 2,400 light years away from Earth. The piece of the nebula shown here is the dark, dense globule IC 1396A; it is commonlycalled the Elephant's Trunk nebula because of its appearance at visible light wavelengths,where there is a dark patch with a bright, sinuous rim. The bright rim is the surface ofthe dense cloud that is being illuminated and ionized by a very bright, massive star (HD 206267) thatis just to the west of IC 1396A. (In the Figure above, the massive star is just to the left of the edge of the image.) The entire IC 1396 region is ionized by the massive star,except for dense globules that can protect themselves from the star's harsh ultravioletrays.The Elephant's Trunk nebula is now thought to be a site of star formation, containing several very young (less than 100,000 yr) stars that were discovered in infrared images in 2003. Two older (but still young, a couple of million years,by the standards of stars, which live for billions of years) stars are present ina small, circular cavity in the head of the globule. Winds from these young stars may have emptied the cavity.The combined action of the light from the massive star ionizing and compressingthe rim of the cloud, and the wind from the young stars shifting gas from the centeroutward lead to very high compression in the Elephant's Trunk nebula. This pressurehas triggered the current generation of protostars.".
- Q1050934 thumbnail 54345main_ic1396_highres.jpg?width=300.
- Q1050934 wikiPageExternalLink ElephantsTrunk.shtml.
- Q1050934 wikiPageExternalLink id1031.html.
- Q1050934 wikiPageExternalLink Capturing-the-Stars-Astrophotography-by-the-Masters.html?image=1.
- Q1050934 wikiPageWikiLink Q10468.
- Q1050934 wikiPageWikiLink Q192621.
- Q1050934 wikiPageWikiLink Q201953.
- Q1050934 wikiPageWikiLink Q41872.
- Q1050934 wikiPageWikiLink Q42372.
- Q1050934 wikiPageWikiLink Q5097827.
- Q1050934 wikiPageWikiLink Q523.
- Q1050934 wikiPageWikiLink Q531.
- Q1050934 wikiPageWikiLink Q8363431.
- Q1050934 comment "The Elephant's Trunk nebula is a concentration of interstellar gas and dust within the much larger ionized gas region IC 1396 located in the constellation Cepheus about 2,400 light years away from Earth. The piece of the nebula shown here is the dark, dense globule IC 1396A; it is commonlycalled the Elephant's Trunk nebula because of its appearance at visible light wavelengths,where there is a dark patch with a bright, sinuous rim.".
- Q1050934 label "Elephant's Trunk nebula".
- Q1050934 depiction 54345main_ic1396_highres.jpg.