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
NGC 604 1,520 ly (470 pc)[1] H II region Located in the Triangulum Galaxy
Gum Nebula 1,100 ly (340 pc) Emission Nebula
N44 1,000 ly (310 pc)[2] Emission Nebula
Sharpless 310 681 ly (209 pc)[3] H II region Nebula surrounding VY Canis Majoris, which is one of largest known stars.
Tarantula Nebula 600 ly (180 pc)[4] H II region Most active starburst region in the Local Group
N119 430 ly × 570 ly (130 pc × 170 pc) H II region Peculiar S-shape
Carina Nebula 460 ly (140 pc)[5] H II region Nearest giant H II region to Earth
RCW 49 350 ly (110 pc) H II region
N70 300 ly (92 pc) 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) H II region
Eagle Nebula 110 ly × 140 ly (34 pc × 43 pc) 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[edit]

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)[6] 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)[7] LαB Largest blob in the LAB Giant Concentration
Himiko Gas Cloud 55,000 ly (17,000 pc)[8] intergalactic cloud
(possible LαB)
One of the most massive lyman-alpha blobs known

List of largest High-velocity clouds[edit]

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)[9] 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)[10] HVC
Smith's Cloud 3,300 ly × 9,800 ly (1,000 pc × 3,000 pc)[11] HVC Extends about 20° of the sky

See also[edit]


  1. ^ distance × sin( diameter_angle / 2 ) = 760 ly. radius
  2. ^ "Roses in the Southern Sky". ESO. 3 November 2003. Retrieved 7 May 2012.
  3. ^ Sharpless, Stewart (1959). "A Catalogue of H II Regions". The Astrophysical Journal Supplement Series. 4: 257. Bibcode:1959ApJS....4..257S. doi:10.1086/190049.
  4. ^ Lebouteiller, V.; Bernard-Salas, J.; Brandl, B.; Whelan, D. G.; et al. (June 2008). "Chemical Composition and Mixing in Giant H II Regions: NGC 3603, 30 Doradus, and N66". The Astrophysical Journal. 680 (1): 398–419. arXiv:0710.4549. Bibcode:2008ApJ...680..398L. doi:10.1086/587503.
  5. ^ "NGC 3372 - The Eta Carinae Nebula". Atlas of the Universe. Retrieved 2013-10-01.
  6. ^ Ravilious, Kate. "Giant "Blob" is Largest Thing in Universe". National Geographic News. Retrieved June 23, 2011.
  7. ^ "Giant Space Blob Glows from Within". ESO Press Release. 17 August 2011. Retrieved 18 August 2011.
  8. ^ Hsu, Jeremy (2009-04-22). "Giant Mystery Blob Discovered Near Dawn of Time". Retrieved 2009-04-24.
  9. ^ 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.
  10. ^ 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.
  11. ^ 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.