411 REFERENCE · Wiktionary
Hubble volume
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Noun
en 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
Translations
the spherical region of the observable universe surrounding an observer
Hungarian: hu Hubble-sugár
See also
cosmological horizon
Hubble limit