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The form of such dark clouds is very irregular: they have no clearly defined outer boundaries and sometimes take on convoluted serpentine shapes. The closest and largest dark nebulae are visible to the naked eye, since they are the least obscured by stars in between Earth and the nebula, and because
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grains in the coldest, densest parts of molecular clouds. Clusters and large complexes of dark nebulae are associated with Giant
Molecular Clouds. Isolated small dark nebulae are called
413:), all of which are relatively transparent. These clouds are the spawning grounds of stars and planets, and understanding their development is essential to understanding
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Di
Francesco, James; Hogerheijde, Michiel R.; Welch, William J.; Bergin, Edwin A. (November 2002). "Abundances of Molecular Species in Bernard 68".
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and nitrogen, which effectively block the passage of light at visible wavelengths. Also present are molecular hydrogen, atomic helium, CO (CO with
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The Milky Way as seen by Gaia, with prominent dark features labeled in white, as well as prominent
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346:. Like other interstellar dust or material, the things it obscures are visible only using
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In the inner molecular regions of dark nebulae, important events take place, such as the
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Dark clouds appear so because of sub-micrometre-sized dust particles, coated with frozen
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Type of interstellar cloud that obscures visible light
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from objects behind it, such as background stars and
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67:. Unsourced material may be challenged and removed.
477:Constellation § List of dark cloud constellations
460:Along with molecular clouds, dark nebula make up
437:. These naked-eye objects are sometimes known as
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467:Dark nebula form in the night sky apparent
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127:Learn how and when to remove this message
318:, that is so dense that it obscures the
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650:ESO - eso9934 - Secrets of a Dark Cloud
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65:adding citations to reliable sources
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475:This section is an excerpt from
441:and take on a variety of names.
161:
41:
52:needs additional citations for
1:
456:Complexes and constellations
147:in front of background stars
789:Evaporating gaseous globule
576:Dark Cloud (disambiguation)
555:half of the galactic plane.
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1171:Kelvin–Helmholtz mechanism
505:Rho Ophiuchi cloud complex
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338:of the light is caused by
254:Kelvin–Helmholtz mechanism
29:
1189:
1142:
1003:
598:The Astrophysical Journal
551:Main dark nebulae of the
535:Main dark nebulae of the
469:dark cloud constellations
462:molecular cloud complexes
439:dark cloud constellations
405:) and a molecular ion N
1126:Pre-main-sequence star
825:Integrated Flux Nebula
556:
544:
528:
500:Dark Horse (astronomy)
485:Great Rift (astronomy)
421:they have the largest
208:Pre-main-sequence star
148:
1161:Initial mass function
815:Protoplanetary nebula
779:Giant molecular cloud
757:Protoplanetary nebula
550:
534:
522:
244:Initial mass function
142:
1154:Theoretical concepts
1111:Young stellar object
835:Post-stellar nebulae
566:List of dark nebulae
231:Theoretical concepts
198:Young stellar object
61:improve this article
30:For other uses, see
1181:Planetary migration
1091:Interstellar medium
926:Intergalactic blobs
891:High-velocity cloud
771:Pre-stellar nebulae
621:2002AJ....124.2749D
495:Serpens–Aquila Rift
320:visible wavelengths
264:Planetary migration
178:Interstellar medium
1176:Nebular hypothesis
1136:Herbig–Haro object
978:Supernova remnants
874:Interstellar cloud
853:Pulsar wind nebula
655:2009-02-04 at the
557:
545:
529:
446:formation of stars
403:cyclopropenylidene
360:infrared astronomy
312:interstellar cloud
259:Nebular hypothesis
223:Herbig–Haro object
149:
1233:
1232:
1166:Jeans instability
1131:Herbig Ae/Be star
1043:
1042:
848:Supernova remnant
820:Wolf–Rayet nebula
747:Reflection nebula
730:Supernova remnant
527:labeled in black.
340:interstellar dust
308:absorption nebula
300:
299:
249:Jeans instability
218:Herbig Ae/Be star
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16:(Redirected from
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933:Lyman-alpha blob
843:Planetary nebula
725:Planetary nebula
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612:astro-ph/0208298
605:(5): 2749–2755.
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316:molecular clouds
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143:The dark nebula
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1096:Molecular cloud
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961:Largest Nebulae
937:
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917:Pinwheel nebula
900:
884:Infrared cirrus
879:Molecular cloud
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752:Variable nebula
720:Emission nebula
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657:Wayback Machine
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431:Coalsack Nebula
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367:carbon monoxide
352:radio astronomy
314:, particularly
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183:Molecular cloud
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1084:Object classes
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1077:Star formation
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972:Protoplanetary
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553:solar antapex
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78: –
77:
76:"Dark nebula"
73:
72:Find sources:
66:
62:
56:
55:
50:This article
48:
44:
39:
38:
33:
19:
1304:Dark nebulae
1288:Solar System
1223:
1212:Stars portal
1211:
1199:
1121:T Tauri star
1105:
810:Nova remnant
794:Solar nebula
735:Nova remnant
709:
645:
602:
596:
590:
539:half of the
466:
459:
443:
423:angular size
419:
391:formaldehyde
364:
344:Bok globules
307:
303:
301:
213:T Tauri star
192:
123:
114:
104:
97:
90:
83:
71:
59:Please help
54:verification
51:
18:Dark nebulae
1314:Cosmic dust
1276:Outer space
1264:Spaceflight
1106:Dark nebula
1101:Bok globule
784:Bok globule
740:H II region
710:Dark nebula
571:Bok globule
525:star clouds
490:Cygnus Rift
411:diazenylium
348:radio waves
304:dark nebula
193:Dark nebula
188:Bok globule
32:Dark Nebula
1298:Categories
1034:Wiktionary
905:Morphology
896:H I region
858:Supershell
582:References
537:solar apex
435:Great Rift
336:extinction
332:reflection
87:newspapers
1252:Astronomy
1116:Protostar
966:Planetary
637:119078546
429:like the
427:Milky Way
377:), CS, NH
375:O isotope
239:Accretion
203:Protostar
117:June 2022
1200:Category
1014:Category
653:Archived
560:See also
433:and the
356:infrared
328:emission
145:LDN 1768
1309:Nebulae
1238:Portals
1224:Commons
1024:Commons
988:Related
956:Diffuse
696:Nebulae
617:Bibcode
383:ammonia
373:as the
101:scholar
980:(SNRs)
974:(PPNe)
867:Clouds
635:
450:masers
393:), c-C
371:oxygen
103:
96:
89:
82:
74:
968:(PNe)
948:Lists
633:S2CID
607:arXiv
324:light
108:JSTOR
94:books
448:and
389:CO (
385:), H
80:news
625:doi
603:124
409:H (
358:in
354:or
350:in
330:or
322:of
306:or
63:by
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302:A
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124:(
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115:(
105:·
98:·
91:·
84:·
57:.
34:.
20:)
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