Bok globule
In astronomy, Bok globules are isolated and relatively small dark nebulae, containing dense cosmic dust and gas from which star formation may take place. Bok globules are found within H II regions, and typically have a mass of about 2 to 50 solar masses contained within a region about a light year or so across (about 4.5×1047 m3). They contain molecular hydrogen (H2), carbon oxides and helium, and around 1% (by mass) silicate dust. Bok globules most commonly result in the formation of double- or multiple-star systems.
| Bok globule | |
|---|---|
The "finger of God" in the Carina Nebula | |
| Characteristics | |
| Type | Isolated Dark nebulae |
| Found | HII regions |
| Mass range | 2M☉-50M☉ |
| Chemical composition | Molecular hydrogen, carbon oxides, helium, and silicate dust |
| Size range | ~1ly |
| External links | |
| Media category | |
| Q213936 | |
| Additional Information | |
| Discovered | Bart Bok, 1940s |
| Star formation |
|---|
| Object classes |
| Theoretical concepts |
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