List of largest cosmic structures


This is a list of the largest cosmic structures so far discovered. The unit of measurement used is the light-year.
This list includes superclusters, galaxy filaments and large quasar groups. The list characterizes each structure based on its longest dimension.
Note that this list refers only to coupling of matter with defined limits, and not the coupling of matter in general. All structures in this list are defined as to whether their presiding limits have been identified.
There are some speculations about this list:

List of largest voids

s are immense spaces between galaxy filaments and other large-scale structures. Technically they are not structures. They are vast spaces which contain very few, or no galaxies. They are theorized to be caused by quantum fluctuations during the early formation of the universe.
A list of the largest voids so far discovered is below. Each is ranked according to its longest dimension.
Void name/designationMaximum dimension
Notes
KBC Void2,000,000,000Void containing the Milky Way galaxy and Local Group
Giant Void1,300,000,000Also known as Canes Venatici Supervoid
Tully-11 void880,000,000Catalogued by R. Brent Tully
Tully-10 void792,000,000Catalogued by R. Brent Tully
Tully-9 void746,000,000Catalogued by R. Brent Tully
B&B Abell-20 void684,000,000
B&B Abell-9 void652,000,000
Tully-7 void567,240,000Catalogued by R. Brent Tully
Tully-4 void564,000,000Catalogued by R. Brent Tully
Tully-6 void557,460,000Catalogued by R. Brent Tully
Bahcall & Soneiro 1982 void554,465,200This suspected void ranged 100 degrees across the sky, and has shown up on other surveys as several separate voids.
Tully-8 void554,200,000Catalogued by R. Brent Tully
B&B Abell-21 void521,600,000
B&B Abell-28 void521,600,000
Eridanus Supervoid489,000,000
A recent analysis of the Wilkinson Microwave Anisotropy Probe in 2007 has found an irregularity of the temperature fluctuation of the cosmic microwave background within the vicinity of the constellation Eridanus with analysis found to be 70 microkelvins cooler than the average CMB temperature. One speculation is that a void could cause the cold spot, with the possible size on the left. However, it may be as large as 1 billion light-years, close to the size of the Giant Void.
B&B Abell-4 void489,000,000
B&B Abell-15 void489,000,000
Tully-3 void489,000,000Catalogued by R. Brent Tully
1994EEDTAWSS-10 void469,440,000
Tully-1 void456,400,000Catalogued by R. Brent Tully
B&B Abell-8 void456,000,000
B&B Abell-22 void456,000,000
Tully-2 void443,360,000Catalogued by R. Brent Tully
B&B Abell-24 void423,800,000
B&B Abell-27 void423,800,000
B&B Abell-7 void391,200,000
B&B Abell-12 void391,200,000
B&B Abell-29 void391,200,000
1994EEDTAWSS-21 void378,160,000
Southern Local Supervoid365,120,000
B&B Abell-10 void358,600,000
B&B Abell-11 void358,600,000
B&B Abell-13 void358,600,000
B&B Abell-17 void358,600,000
B&B Abell-19 void358,600,000
B&B Abell-23 void358,600,000
1994EEDTAWSS-19 void342,100,000
Northern Local Supervoid339,202,240Virgo Supercluster, Coma Supercluster, Perseus-Pisces Supercluster, Ursa Major-Lynx Supercluster, Hydra-Centaurus Supercluster, Sculptor Supercluster, Pavo-Corona Australes Supercluster form a sheet between the Northern Local Supervoid and the Southern Local Supervoid. The Hercules Supercluster separates the Northern Local Void from the Boötes Void. The Perseus-Pisces Supercluster and Pegasus Supercluster form a sheet separate the Northern Local Void and Southern Local Void from the Pegasus Void.
Boötes void330,000,000Also known as The Giant Nothing
1994EEDTAWSS-12 void328,000,000
SSRS1 4 void217,437,333.3
GACIRASS V0 void215,262,960
BOSSCMASS 4407 void207,001,428.5
SSRS2 3 void198,302,848
Local void195,693,600One of the nearest voids known and contains 3 galaxies.
SSRS2 2 void183,299,672
SSRS2 1 void177,102,708
BOSSCMASS 11496 void171,143,837.9
IRAS 1 void166,399,560
SSRS1 3 void163,078,000
IRAS 4 void146,770,200
IRAS 3 void145,139,420
IRAS 2 void142,856,328
IRAS 7 void141,877,860
SSRS2 11 void139,920,924
IRAS 6 void135,028,584
IRAS 13 void131,440,868
Pegasus void130,462,400The Perseus-Pisces Supercluster and Pegasus Supercluster form a sheet separate the Northern Local Void and Southern Local Void from the Pegasus Void.
IRAS 8 void128,831,620
SSRS2 9 void127,200,840
BOSSCMASS 15935 void126,166,925.5
IRAS 9 void117,416,160
IRAS 5 void117,416,160
SSRS2 4 void116,111,536
SSRS2 5 void113,502,288
SSRS2 10 void113,502,288
IRAS 10 void109,588,416
SSRS1 1 void108,718,666.7Located just behind the galaxy concentration Eridanus-Fornax-Dorado.
BOSSCMASS 60 void105,341,864.9
IRAS 11 void104,369,920
SSRS2 6 void104,369,920
IRAS 12 void102,739,140
IRAS 15 void99,151,424
SSRS1 2 void97,846,800
IRAS 14 void93,932,928
SSRS2 8 void90,671,368
SSRS2 15 void89,040,588
GACIRASS V1 void83,169,780
SSRS2 7 void83,169,780
SSRS2 12 void81,539,000
GACIRASS V3 void81,539,000
SSRS2 13 void72,080,476
SSRS2 14 void69,471,228
SSRS2 18 void68,818,916
SSRS2 16 void66,209,668
GACIRASS V2 void63,600,420
SSRS2 17 void61,969,640
BOSSCMASS 10020 void52,067,543.84