KnowraObservable universeLinked fromLinked fromThe 25 pages that link to Observable universe, each with the reason it gives.All 25Broader topic 4Related 8Narrower topic 11Compared with 2Alexander FriedmannRelated: Cosmological models derived from Friedmann’s work describe the observable universe’s evolving scale.Order of magnitudeRelated: Its estimated diameter is about 10²⁷ metres, an example of an immense length scale.Accelerating expansion of the universeRelated: Continued acceleration affects how much of the universe can ever be observed.Cosmological horizonRelated: Its boundary is associated with the particle horizon, not necessarily the event horizon.Hubble flowRelated: Its scale and boundary are interpreted within a universe whose distances evolve through expansion.Heinrich Wilhelm Matthias OlbersRelated: Its finite extent limits the number of distant stars contributing light to the sky.Recessional velocityRelated: Expansion and recession help determine which regions can ever be observed.Shape of the universeRelated: Its finite horizon limits which global features can be tested.