Lagoon Nebula
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| Emission nebula | |
|---|---|
| H II region | |
| The Lagoon Nebula as imaged by the Vera C. Rubin Observatory in very high-resolution, taken on May 28, 2025[1] [a] | |
| Observation data: J2000 epoch | |
| Right ascension | 18h 03m 37s[2] |
| Declination | −24° 23′ 12″[2] |
| Distance | 4,100[3] ly (1,250 pc) |
| Apparent magnitude (V) | 4.6[4] |
| Apparent dimensions (V) | 90 ×ばつ 40 arcmins [4] |
| Constellation | Sagittarius |
| Physical characteristics | |
| Radius | 55 ×ばつ 20 ly |
| Designations | Sharpless 25, RCW 146, Gum 72 M8 contains: NGC 6523, NGC 6530,[2] Hourglass nebula[5] |
| See also: Lists of nebulae | |
The Lagoon Nebula (catalogued as Messier 8 or M8, NGC 6523, Sharpless 25, RCW 146, and Gum 72) is a giant emission nebula with an H II region located in the constellation Sagittarius. Discovered by Giovanni Hodierna in 1654, it is one of only two star-forming nebulae faintly visible to the naked eye from mid-northern latitudes[6] [7] (the other being the Orion Nebula).
Characteristics
[edit ]Located approximately 4,000–6,000 light-years from Earth, the nebula spans 110 by 50 light-years (appearing as 90' by 40' in Earth's sky). While appearing pink in long-exposure photographs, it typically appears gray when viewed through binoculars or telescopes due to the human eye's limited color sensitivity in low-light conditions. The nebula contains the young open cluster NGC 6530 within its structure.[8]
The Lagoon Nebula features several distinctive structures, including:
- Multiple Bok globules cataloged by E. E. Barnard (B88, B89, and B296)
- A funnel-shaped structure formed by ultraviolet radiation from a hot O-type star
- The centrally-located Hourglass Nebula (named by John Herschel), distinct from the Engraved Hourglass Nebula in Musca
Observations in 2006 revealed four Herbig–Haro objects within the Hourglass structure, providing direct evidence of ongoing star formation through accretion processes.[3]
Gallery
[edit ]-
Lagoon Nebula in HaRGB
-
Lagoon Nebula in SHO by amateur astronomer Buzz Jumaah from Auckland, New Zealand
-
False color (SHO without green reduction) close up from Madison, Wisconsin, USA
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See also
[edit ]Notes
[edit ]- ^ The bluish-pink nebula on the upper right is the Trifid Nebula.
References
[edit ]- ^ "Trifid and Lagoon (Image)". NSF–DOE Vera C. Rubin Observatory. 2025. Retrieved 2025年06月26日.
- ^ a b c "M 8". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2006年11月15日.
- ^ a b Arias, J. I.; Barbá, R. H.; Maíz Apellániz, J.; Morrell, N. I.; Rubio, M. (2006). "The infrared Hourglass cluster in M8". Monthly Notices of the Royal Astronomical Society . 366 (3): 739–757. arXiv:astro-ph/0506552 . Bibcode:2006MNRAS.366..739A. doi:10.1111/j.1365-2966.2005.09829.x . S2CID 13907667.
- ^ a b Stoyan, Ronald (2008). Atlas of the Messier Objects: Highlights of the Deep Sky. Cambridge University Press. p. 88. ISBN 978-0-521-89554-5.
- ^ "SIMBAD Astronomical Database". Results for Hourglass Nebula. Retrieved 2006年12月22日.
- ^ Vowler, Faith; Bolles, Dana (12 September 2024). "Messier 8". NASA Science. Archived from the original on 17 March 2025. Retrieved 17 March 2025.
M8 was discovered in 1654
- ^ Kronberg, Guy McArthur, Hartmut Frommert, Christine. "Messier Object 8". messier.seds.org. Retrieved 11 April 2018.
{{cite web}}: CS1 maint: multiple names: authors list (link) - ^ N. F. H. Tothill; Marc Gagné; B. Stecklum; M. A. Kenworthy (2008). "The Lagoon Nebula and its Vicinity". In Bo Reipurth (ed.). Handbook of Star-Forming Regions: Volume 2 The Southern Sky. Astronomical Society of the Pacific. p. 53. ISBN 978-1-58381-671-4.
External links
[edit ]
- Breaking Waves in the Stellar Lagoon — ESA/Hubble Photo Release
- Messier 8, SEDS Messier pages
- NightSkyInfo.com – M8, the Lagoon Nebula Archived 2008年09月25日 at the Wayback Machine
- Messier 8, Pete's Astrophotography Gallery Archived 2008年11月20日 at the Wayback Machine
- Messier 8, Lagoon Nebula, Map
- Astronomy Picture of the Day (APOD): Lagoon Nebula
- APOD: 2005 August 3 - The Busy Center of the Lagoon Nebula
- The Scale of the Universe (Astronomy Picture of the Day 2012 March 12)
- The Lagoon Nebula on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- 7/30/2015 Photo release Hubble Space Telescope
- Lagoon Nebula on Instagram
