particle horizon


Also found in: Wikipedia.

particle horizon

See horizon distance.

particle horizon

[′pärd·ə·kəl hə‚rīz·ən]
(relativity)
The spatial boundary beyond which, in certain universe models, it is impossible for an observer at a given time to receive a signal.
Mentioned in ?
References in periodicals archive ?
In The Eroded Surface, ancient vapor droplet, extinction, particle horizon (various), 2002, glitzy, computer-generated symbols (their meanings never specified) swagger vertically (think sculptures on Easter Island) in a lurid Technicolor desert setting worthy of an early Star Trek episode.

Full browser ?