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
- Hubble limit