List of largest nebulae

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NGC 604, one of largest nebulae (H II region) is localed in the Triangulum Galaxy (viewed by the Hubble Space Telescope).

Below is a list of the largest nebulae so far discovered, ordered by size.


List of the largest nebulae
Nebula Size (ly/pc) Type Notes
Tarantula Nebula 1,862 ly (571 pc)[1][a] H II region Most active starburst region in the Local Group
NGC 604 1,520 ly (470 pc)[2][3][b] H II region Located in the Triangulum Galaxy
N44 1,000 ly (310 pc)[4] Emission nebula
Gum Nebula 809–950 ly (248–291 pc)[5][6] Emission nebula
N119 430 ly × 570 ly (130 pc × 170 pc)[7] H II region Peculiar S-shape
Sharpless 310 531–681 ly (163–209 pc)[8][c] H II region Nebula surrounding VY Canis Majoris, which is one of largest known stars.
Carina Nebula 460 ly (140 pc)[9] H II region Nearest giant H II region to Earth
RCW 49 350 ly (110 pc)[10] H II region
N 70 Nebula 300 ly (92 pc)[11] H II region The N 70 Nebula, in the Large Magellanic Cloud has a shell structure and is really a bubble in space. It is a "Super Bubble".
Barnard's Loop 100 or 300 ly (31 or 92 pc)[12][13] H II region
Eagle Nebula 110 ly × 140 ly (34 pc × 43 pc)[14] H II region
Rosette Nebula 130 ly (40 pc) H II region
Lagoon Nebula 40 ly × 110 ly (12 pc × 34 pc) H II region
Veil Nebula 100 ly (31 pc) Supernova remnant

List of largest lyman-alpha blobs

Polarized image of Lyman-alpha blob 1, shown as the faint, green gas cloud
List of the largest lyman-alpha blobs
Lyman-alpha blobs Size (ly/pc) Type Notes
LAB Giant Concentration
(coinciding with EQ J221734.0+001701)
200,000,000 ly (61,000,000 pc)[15] complex of LαBs Also on record as one of the largest structures in the universe.
Lyman-alpha blob 1 300,000 ly (92,000 pc)[16] LαB Largest blob in the LAB Giant Concentration
Himiko Gas Cloud 55,000 ly (17,000 pc)[17] intergalactic cloud
(possible LαB)
One of the most massive lyman-alpha blobs known

List of largest High-velocity clouds

List of the largest High-velocity clouds
High-velocity clouds Size (ly/pc) Type Notes
NGC 262 Halo Cloud 1,300,000 ly (400,000 pc) H I region Spiral nebula surrounding NGC 262, which is one of the largest known galaxies.
Leo Ring 650,000 ly (200,000 pc)[18] HVC
Magellanic Stream 600,000 ly (180,000 pc) complex of HVCs Connects the Large and Small Magellanic clouds; extends across 180° of the sky.
HVC 127-41-330 20,000 ly (6,100 pc)[19] HVC
Smith's Cloud 3,300 ly × 9,800 ly (1,000 pc × 3,000 pc)[20] HVC Extends about 20° of the sky

See also


  1. ^ distance × sin( diameter_angle ) = 1,862 ly
  2. ^ distance × sin( diameter_angle ) = 1,520 ly
  3. ^ Those measuraments are based on an apparent diameter of 480 arcminutes (') plus an assumed distance of 1.5 kpc and the current distance of VY CMa which is about 1.17 kpc since the nebula is sometimes found to have the same distance as VY CMa.


  1. ^ "Results for Tarantula Nebula". SEDS Students for the Exploration and Development of Space. Retrieved 2007-05-08. 30 Doradus .. 49 kpc +- 3 kpc
  2. ^ Barba, Rodolfo (2004). "An in-depth analysis of a prototypical giant H II region: NGC 604". HST Proposal ID #10419: 10419. Bibcode:2004hst..prop10419B.
  3. ^ "NASA/IPAC Extragalactic Database". Results for NGC 604. Retrieved 2006-09-03.
  4. ^ "Roses in the Southern Sky". ESO. 3 November 2003. Retrieved 7 May 2012.
  5. ^ Sushch, I.; Hnatyk, B.; Neronov, A. (2011). "Modeling of the Vela complex including the Vela supernova remnant, the binary system γ2 Velorum, and the Gum nebula". Astronomy and Astrophysics. 525: A154. arXiv:1011.1177. Bibcode:2011A&A...525A.154S. doi:10.1051/0004-6361/201015346.
  6. ^ "result for Gum 12". Galaxy Map. Retrieved 2018-11-15.
  7. ^ Ambrocio-Cruz, P.; Rosado, M.; Laval, A.; Le Coarer, E.; Russeil, D.; Amram, P. (July 22, 2008). "Kinematic field of the S-shaped nebula N119 in the LMC" (PDF). Revista Mexicana de Astronomía y Astrofísica. 44: 355. Bibcode:2008RMxAA..44..355A.
  8. ^ Sharpless, Stewart (1959). "A Catalogue of H II Regions". The Astrophysical Journal Supplement Series. 4: 257. Bibcode:1959ApJS....4..257S. doi:10.1086/190049.
  9. ^ "NGC 3372 - The Eta Carinae Nebula". Atlas of the Universe. Retrieved 2013-10-01.
  10. ^ NASA Astronomy Picture of the Day: Cosmic Construction Zone RCW 49 (3 June 2004)
  11. ^ "N70 Nebula in the Large Magellanic Cloud". Retrieved 15 November 2018.
  12. ^ Wilson, B.A.; Dame, T.M.; Masheder, M.R.W.; Thaddeus, P. (2005). "A uniform CO survey of the molecular clouds in Orion and Monoceros". Astronomy and Astrophysics. 430: 523–539. arXiv:astro-ph/0411089v1. Bibcode:2005A&A...430..523W. doi:10.1051/0004-6361:20035943.
  13. ^ O'Dell, C.R.; Ferland, G.J.; Porter, R.L.; van Hoof, P.A.M. (2011). "Physical Conditions in Barnard's Loop, Components of the Orion-eridanus Bubble, and Implications for the Warm Ionized Medium Component of the Interstellar Medium". The Astrophysical Journal. 733 (1): 9. arXiv:1103.2789. Bibcode:2011ApJ...733....9O. doi:10.1088/0004-637X/733/1/9.
  14. ^ Messier 16
  15. ^ Ravilious, Kate. "Giant "Blob" is Largest Thing in Universe". National Geographic News. Retrieved June 23, 2011.
  16. ^ "Giant Space Blob Glows from Within". ESO Press Release. 17 August 2011. Retrieved 18 August 2011.
  17. ^ Hsu, Jeremy (2009-04-22). "Giant Mystery Blob Discovered Near Dawn of Time". Retrieved 2009-04-24.
  18. ^ Léo Michel-Dansa; Pierre-Alain Duc (2010). "The mysterious Leo giant gas ring explained by a billion year old collision between two galaxies". Canada France Hawaii Telescope.
  19. ^ Josh Simon (2005). "Dark Matter in Dwarf Galaxies: Observational Tests of the Cold Dark Matter Paradigm on Small Scales" (PDF). Archived from the original (PDF) on September 13, 2006.
  20. ^ Lockman, Felix J.; Benjamin, Robert A.; Heroux, A. J.; Langston, Glen I. (May 2008). "The Smith Cloud: A High-Velocity Cloud Colliding with the Milky Way" (PDF). The Astrophysical Journal. 679 (1): L21. arXiv:0804.4155. Bibcode:2008ApJ...679L..21L. doi:10.1086/588838. Retrieved April 3, 2012.
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