cosmological horizon

English

Noun

cosmological horizon (plural cosmological horizons)

(astronomy) The distance from an observer in a universe beyond which it is impossible for the observer to see, as the light (or other luminal particles) cannot have travelled that distance over the current age of that universe.

Usage notes

Typically the cosmological horizon refers to the cosmological horizon of an observer on Earth.

Synonyms

Hubble horizon
particle horizon
comoving horizon
cosmic light horizon
cosmic event horizon
cosmological event horizon

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