Hubble volume

English

Noun

Hubble volume (plural Hubble volumes)

1. (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