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To help compare different orders of magnitude, this page lists distances starting at 10 Ym (10²⁵ m or 1.1 gigalight-years). At this scale, expansion of the universe becomes significant. Distance of these objects are derived from their measured redshifts, which depends on the cosmological models used.

Distances shorter than 10 Ym

• 13.7 Ym - Length of the largest known cosmic structure, the Sloan Great Wall.
• 18 Ym — redshift 0.16 — 1.9 gigalight-years — Distance to the quasar 3C 273 (light travel distance)
• 33 Ym — 3.5 gigalight-years — Maximum distance of the 2dF Galaxy Redshift Survey (light travel distance)
• 75 Ym — redshift 0.95 — 8.0 gigalight-years — Approximate distance to the supernova SN 2002dd in the Hubble Deep Field North (light travel distance)
• 85 Ym — redshift 1.6 — 9.0 gigalight-years — Approximate distance to the gamma ray burst GRB 990123 (light travel distance)
• 94.6 Ym — 10 gigalight-years — Approximate distance to quasar OQ172

Distances longer than 100 Ym

The universe within 1 billion light years of Earth

[edit] See also

• Orders of magnitude (length)