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document updated 15 years ago, on Oct 20, 2008
Our place among the large-scale structure of the cosmos:

structure nearest neighbor diameter mass gap to nearest neighbor # civilizations
our Solar System (nearest neighbor: Proxima Centauri) 0.0018 ly 1.001 M⊙ 4.2 ly 1
M 4 and NGC 6397 globular clusters 70 ly unknown 0
Milky Way Galaxy (nearest neighbor: Canis Major Dwarf Galaxy) 100,000 ly 5.8×1011 M⊙ 25,000 ly (from Earth) 37964.97±20
Milky Way subgroup (nearest neighbor: Andromeda subgroup) 1.8 mly 2 mly (from Earth)
Local Group (nearest neighbor: IC 342/Maffei Group) 10 mly 1.29×1012 M⊙ 9.1 mly (from Earth)
Virgo Supercluster (nearest neighbor: Hydra-Centaurus Supercluster 200 mly 1015 M⊙ 158 mly (from Earth)
Centaurus Wall? (nearest neighbor: ?)