Barnard 68
| Dark fog, molecular cloud | |
|---|---|
| Barnard 68 | |
|
|
| Image of the Very Large Telescope | |
| Constellation | Snake bearer |
|
Position equinox : J2000.0 |
|
| Right ascension | 17h 22m 38.2s |
| declination | -23 ° 49 ′ 34 ″ |
| Further data | |
| distance |
500 ly |
| Affiliation | |
| diameter | 0.5 ly |
| history | |
| Catalog names | |
| Barnard 68 • LDN 57 | |
| Aladin previewer | |
Barnard 68 is a dark cloud or Bok globule . It is located in the southern constellation Serpent Bearer and is about 500 light years away. The interior of the cloud is very cold, the temperature is around 9 K (−264 ° C). The total mass corresponds to about twice the mass of the sun, with the cloud being half a light year in size.
The catalog name of the dark cloud goes back to the fact that the astronomer Edward Emerson Barnard included it in 1919 in his catalog of 350 objects, published in 1927, of dark nebulae.
Web links
Commons : Barnard 68 - collection of images, videos and audio files
- The Black Cloud - Ken Croswell (English)
- C18O abundance in the nearby globule Barnard 68 (English)
- ESO: How to Become a Star - ESO Telescopes Provide Most Detailed View Ever Into a Dark Cloud (January 10, 2001)
Individual evidence
- ↑ a b c SIMBAD Astronomical Database (Barnard 68) . Center de Données astronomiques de Strasbourg. Retrieved March 1, 2009.
- ↑ a b c Molecular Cloud Barnard 68 - Astronomy Picture of the Day of May 11, 1999 (English).
- ↑ M. Nielbock, R. Launhardt, J. Steinacker, AM Stutz, Z. Balog: The Earliest Phases of Star formation (EPoS) observed with Herschel: the dust temperature and density distributions of B68 . In: Astronomy & Astrophysics . tape 547 , November 2012, ISSN 0004-6361 , p. A11 , doi : 10.1051 / 0004-6361 / 201219139 ( aanda.org [accessed August 23, 2019]).
- ^ A. Roy, Ph. André, P. Palmeirim, M. Attard, V. Könyves: Reconstructing the density and temperature structure of prestellar cores from Herschel data: A case study for B68 and L1689B . In: Astronomy & Astrophysics . tape 562 , 2014, ISSN 0004-6361 , p. A138 , doi : 10.1051 / 0004-6361 / 201322236 ( aanda.org [accessed August 23, 2019]).