List of largest known nebulae

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

Below is a list of the largest known nebulae so far discovered, ordered by actual diameter. This list is prone to change because of inconsistencies between studies, the great distances of nebulae from our stellar neighborhood, and the constant refinement of technology and engineering.

Caveats[edit]

Nebulae have no standardized boundaries, so the measurements are subject to revision. Lastly, scientists are still defining the features and parameters of nebulae. Because of these rapid developments and adjustments, this list might be potentially unreliable.

List[edit]

List of the largest nebulae
Image Nebula Maximum dimension
(in light-years/parsecs)
Type Notes
NGC 262 Halo Cloud 1,300,000 ly (400,000 pc)[1] H I region Spiral nebula surrounding NGC 262, which is one of the largest known galaxies.
Leo Ring 650,000 ly (200,000 pc)[2] HVC
Magellanic Stream 600,000 ly (180,000 pc)[3] complex of HVCs Connects the Large and Small Magellanic clouds; extends across 180° of the sky.
Lyman-alpha blob 1 300,000 ly (92,000 pc)[4] LαB Largest blob in the LAB Giant Concentration[citation needed]
Himiko Gas Cloud 55,000 ly (17,000 pc)[5] Intergalactic cloud
(possible LαB)
One of the most massive lyman-alpha blobs known
HVC 127-41-330 20,000 ly (6,100 pc)[6] HVC
Smith's Cloud 9,800 ly (3,000 pc)[7] HVC Extends about 20° of the sky
Tarantula Nebula 1,895 ly (581 pc)[8][a] H II region Most active starburst region in the Local Group
NGC 604 1,520 ly (470 pc)[9][10][b] H II region Located in the Triangulum Galaxy
N44 1,000 ly (310 pc)[11] Emission nebula
N11 1,000 ly (310 pc)[12] H II region
NGC 2404 940 ly (290 pc) H II region Largest H II region located in the spiral galaxy NGC 2403
NGC 595 880 ly (270 pc)[13] H II region
Ring Nebula (NGC 6822) 838 ly (257 pc) H II region The Ring Nebula is located in the lower right of the image
Gum Nebula 809–950 ly (248–291 pc)[14][15] Emission nebula Extends about 36° of the sky
Bubble Nebula (NGC 6822) 758 ly (232 pc)[16][17][18] H II region The Bubble Nebula is located in the upper left of the image
NGC 6188 600 ly (180 pc)[19] Emission nebula
NGC 592 580 ly (180 pc)[20][21] H II region
Sh2-310 531–681 ly (163–209 pc)[22][c] H II region Nebula surrounding VY Canis Majoris, which is one of largest known stars.
Carina Nebula 460 ly (140 pc)[23] H II region Nearest giant H II region to Earth
Dragonfish Nebula 450 ly (140 pc)[24] Emission nebula
N119 430–570 ly (131–175 pc)[25] H II region Peculiar S-shape
RCW 49 350 ly (110 pc)[26] H II region
Heart Nebula 330 ly (100 pc)[27] H II region
Henize 70 (N70 or DEM L301)[28] 300 ly (92 pc)[29] 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 300 ly (92 pc)[30][31] H II region
Sh2-54 252 ly (77 pc)[32][33] H II region
Prawn Nebula 250 ly (77 pc)[34] H II region
Simeis 147 160 ly (49 pc)[35] Supernova remnant
NGC 7822 150 ly (46 pc)[36] Emission nebula
IC 2944 142 ly (44 pc)[37][38] Emission nebula
Eagle Nebula 140 ly (43 pc)[39] H II region Part of another diffuse nebula IC 4703.
Rosette Nebula 130 ly (40 pc)[40] H II region
RCW 79 122 ly (37 pc)[41] Emission nebula
Lagoon Nebula 110 ly (34 pc)[42] H II region
NGC 3576 100 ly (31 pc)[43] Emission nebula
N41 100 ly (31 pc)[44] Emission nebula
The following well-known nebulae are listed for the purpose of comparison.
Orion Nebula 20 ly (6.132 pc)[45] Diffuse Nebula
Crab Nebula 11 ly (3.4 pc)[46] Supernova remnant
Bubble Nebula 6[47]-10[48][49] ly (1.84-3.066 pc) Emission nebula
Helix Nebula 5.74 ly (1.76 pc)[50] Emission nebula
Eightburst Nebula 0.8 ly (0.2453 pc)[51] Emission nebula
Homunculus Nebula 0.58 ly (0.1778 pc) [52] Emission nebula Surrounds the star system Eta Carinae.
Stingray Nebula 0.16 ly (0.049 pc)[53] Emission nebula One of the smallest nebulae.

See also[edit]

Notes[edit]

  1. ^ distance × sin( diameter_angle ) = 1,895 ly
  2. ^ distance × sin( diameter_angle ) = 1,520 ly
  3. ^ Those measurements 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 as the nebula is sometimes found to have the same distance as VY CMa.

References[edit]

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  42. ^ NASA Astronomy Picture of the Day: The Lagoon Nebula without Stars (8 August 2022)
  43. ^ NASA Astronomy Picture of the Day: NGC 3576: The Statue of Liberty Nebula (28 September 2016)
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Sources[edit]