Messier 42
Messier 42 (M42, NGC 1976) sī chi̍t-ê chhiⁿ-hûn, ia̍h hō-chòe La̍h-hō͘-chō tōa-chhiⁿ-hûn, tī thiⁿ-kiû ê ūi-tì tī La̍h-hō͘-chō (Orion), chham tē-kiû ê kū-lî ū 1,270±76 kng-nî.
| Diffuse nebula | |
|---|---|
 Messier 42 ê khó-kiàn-kng siòng-phìⁿ. The entire Orion Nebula in a composite image of visible light and infrared; taken by Hubble Space Telescope in 2006 | |
| Observation data: J2000 epoch | |
| Subtype | Reflection/Emission[2] |
| Right ascension | 05h 35m 17.3s[1] |
| Declination | −05° 23′ 28″[1] |
| Distance | 1,344±20 ly (412[3] pc) |
| Apparent magnitude (V) | 4.0[4] |
| Apparent dimensions (V) | 65×60 arcmins[5] |
| Constellation | Orion |
| Physical characteristics | |
| Radius | 12[a] ly |
| Absolute magnitude (V) | — |
| Notable features | Trapezium cluster |
| Designations |
NGC 1976, M42, LBN 974, Sharpless 281 |
Tsù-kái
siu-kái- ↑ 1.0 1.1 "NGC 7538". SIMBAD. Centre de données astronomiques de Strasbourg. October 20, 2006 khòaⁿ--ê.
- ↑ Gater, Will; Vamplew, Anton (2010). The Practical Astronomer (1st American pán.). London: DK Pub. p. 242. ISBN 978-0-7566-7324-6.
- ↑ Reid, M. J.; et al. (2009). "Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions". Astrophysical Journal. 700 (1): 137–148. arXiv:0902.3913
. Bibcode:2009ApJ...700..137R. doi:10.1088/0004-637X/700/1/137.
- ↑ "NGC 1976 = M42". SEDS.org. December 13, 2009 khòaⁿ--ê.
- ↑ Revised NGC Data for NGC 1976 per Wolfgang Steinicke's Revised New General Catalogue and Index Catalogue.
Guā-pōo lên-ket
siu-kái
| Wikisource ū koan-hē pún bûn-chiong ê goân-sú bûn-pún: |
| Wikisource ū koan-hē pún bûn-chiong ê goân-sú bûn-pún: |
- Orion Nebula photographs taken by Andrew Ainslie Common in 1883, part of the London Science Museum's collection
- "Animated tour of the Orion Nebula" Archived June 6, 2013, at the Wayback Machine., University of South Wales
- Orion Nebula observed by Chandra/HST
- Orion Nebula observed by Gemini Observatory
- Orion Nebula at ESA/Hubble Archived 2009-01-30 at the Wayback Machine.
- Messier 42, SEDS Messier pages and specifically NGC 1976.
- January 2006 Hubble Space Telescope image of the Orion Nebula
- January 2006 Hubble Space Telescope image of the Trapezium cluster
- Orion Nebula M42, Hubble Images
- Remarkable new views captured of Orion Nebula, SpaceFlight Now, 2001.
- NightSkyInfo.com – The Great Orion Nebula
- Astronomy Picture of the Day
- Spitzer's Orion 2010 April 10
- Planetary Systems Now Forming in Orion 2009 December 22
- Great Orion Nebulae 2008 October 23
- Gray, Meghan; et al. "M42 – Orion Nebula". Deep Sky Videos. Brady Haran.
- The Orion Nebula on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- ESO: Hidden Secrets of Orion’s Clouds incl. Photos and animations