Hubble volume

English

Noun

Hubble volume (plural Hubble volumes)

(cosmology) the spherical region of the observable universe surrounding an observer beyond which objects recede from that observer at a rate greater than the speed of light due to the expansion of the Universe.

Synonyms

Hubble sphere
subluminal sphere
causal sphere
sphere of causality

See also

cosmological horizon
Hubble limit

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