Hästhuvudnebulosan
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| Hästhuvudnebulosan | |
 (c) Ken Crawford, CC BY-SA 3.0 Hela regionen runt hästhuvudnebulosan, med IC 434 i nedre vänstra hörnet | |
| Observationsdata | |
|---|---|
| Typ | Mörk nebulosa |
| Stjärnbild | Orion |
| Rektascension | 05t 40m 59s |
| Deklination | -02° 27′ 30″[1] |
| Avstånd | 1500 ljusår |
| Skenbar storlek | 8 × 6 bågminuter |
| Upptäckt | |
| Upptäcktsår | 1888 |
| Upptäckare | Williamina Fleming |
| Andra beteckningar | |
| Barnard 33, LDN 1630 | |
| Se även: Nebulosor, Lista över nebulosor | |
Hästhuvudnebulosan (Barnard 33) är en mörk nebulosa i Orion, ungefär 1 500 ljusår från jorden.
Nebulosan är belägen alldeles nedanför Alnitak, stjärnan längst till vänster i Orions bälte.
Nebulosans röda sken kommer från vätgas, joniserad av ljuset från den närbelägna ljusstarka stjärnan Sigma Orionis. Hästhuvudets mörker består främst av tätt rymdstoft. De lysande punkterna i Hästhuvudnebulosans bas är unga stjärnor som just håller på att bildas. Upptäckaren av nebulosan är Williamina Fleming.
Referenser
- ^ ”Basic data: NAME HORSEHEAD NEBULA -- Dark Cloud (nebula)”. Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NAME%20HORSEHEAD%20NEBULA. Läst 1 september 2014.
Media som används på denna webbplats
Question book-4.svg
Författare/Upphovsman: Tkgd2007, Licens: CC BY-SA 3.0
A new incarnation of Image:Question_book-3.svg, which was uploaded by user AzaToth. This file is available on the English version of Wikipedia under the filename en:Image:Question book-new.svg
Författare/Upphovsman: Tkgd2007, Licens: CC BY-SA 3.0
A new incarnation of Image:Question_book-3.svg, which was uploaded by user AzaToth. This file is available on the English version of Wikipedia under the filename en:Image:Question book-new.svg
Barnard 33.jpg
(c) Ken Crawford, CC BY-SA 3.0
Horsehead Nebula (also known as Barnard 33 in emission nebula IC 434) is a dark nebula in the constellation Orion.
The image is a frame mosaic taken with 5 different filters, standard Red – Green – Blue with details enhanced with narrowband data of Hydrogen-alpha (Hα) and O III. The Hα was color-mapped to red and the O III to teal. So it is a representative color image consisting of over 900 minutes of exposure time.
(c) Ken Crawford, CC BY-SA 3.0
Horsehead Nebula (also known as Barnard 33 in emission nebula IC 434) is a dark nebula in the constellation Orion.
The image is a frame mosaic taken with 5 different filters, standard Red – Green – Blue with details enhanced with narrowband data of Hydrogen-alpha (Hα) and O III. The Hα was color-mapped to red and the O III to teal. So it is a representative color image consisting of over 900 minutes of exposure time.
A reproduction of a composite colour image of the Horsehead Nebula and its immediate surroundings - Eso0202a.jpg
Författare/Upphovsman: European Southern Observatory, Licens: CC BY 4.0
A reproduction of a composite colour image of the Horsehead Nebula and its immediate surroundings. It is based on three exposures in the visual part of the spectrum with the FORS2 multi-mode instrument at the 8.2-m KUEYEN telescope at Paranal. It was produced from three images, obtained on February 1, 2000, with the FORS2 multi-mode instrument at the 8.2-m KUEYEN Unit Telescope and extracted from the VLT Science Archive Facility . The frames were obtained in the B-band (600 sec exposure; wavelength 429 nm; FWHM 88 nm; here rendered as blue), V-band (300 sec; 554 nm; 112 nm; green) and R-band (120 sec; 655 nm; 165 nm; red). The original pixel size is 0.2 arcsec. The photo shows the full field recorded in all three colours, approximately 6.5 x 6.7 arcmin 2 . The seeing was about 0.75 arcsec. This image is available as a mounted image in the ESOshop. #L
Författare/Upphovsman: European Southern Observatory, Licens: CC BY 4.0
A reproduction of a composite colour image of the Horsehead Nebula and its immediate surroundings. It is based on three exposures in the visual part of the spectrum with the FORS2 multi-mode instrument at the 8.2-m KUEYEN telescope at Paranal. It was produced from three images, obtained on February 1, 2000, with the FORS2 multi-mode instrument at the 8.2-m KUEYEN Unit Telescope and extracted from the VLT Science Archive Facility . The frames were obtained in the B-band (600 sec exposure; wavelength 429 nm; FWHM 88 nm; here rendered as blue), V-band (300 sec; 554 nm; 112 nm; green) and R-band (120 sec; 655 nm; 165 nm; red). The original pixel size is 0.2 arcsec. The photo shows the full field recorded in all three colours, approximately 6.5 x 6.7 arcmin 2 . The seeing was about 0.75 arcsec. This image is available as a mounted image in the ESOshop. #L