Lagoon Nebula

Template:Short description Template:Infobox nebula 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<ref>Template:Cite web</ref><ref>Template:Cite web</ref> (the other being the Orion Nebula).

Characteristics

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.<ref>Template:Cite book</ref>

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.<ref name="Ariasetal2006" />

Gallery

• Lagoon Nebula in HaRGB
  Lagoon Nebula in HaRGB
• Lagoon Nebula in SHO by amateur astronomer Buzz Jumaah from Auckland, New Zealand
  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
  False color (SHO without green reduction) close up from Madison, Wisconsin, USA

See also

• List of Messier objects
• Lists of nebulae

External links

• Breaking Waves in the Stellar Lagoon — ESA/Hubble Photo Release
• Messier 8, SEDS Messier pages
• NightSkyInfo.com – M8, the Lagoon Nebula Template:Webarchive
• Messier 8, Pete's Astrophotography Gallery Template:Webarchive
• 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)
• Template:WikiSky
• 7/30/2015 Photo release Hubble Space Telescope
• Lagoon Nebula on Instagram