Hubble volume

noun

Hubble volume

noun

Astronomy, Cosmology, Natural sciences 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
Related terms: cosmological horizon, Hubble limit

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.