Look up event horizon in Wiktionary, the free dictionary.
An event horizon is a boundary around a black hole inside which events cannot affect an outside observer.
Event horizon or Event Horizon may also refer to:
- Event Horizon Telescope, a type of astronomical interferometer
- Event Horizon (film), a 1997 science fiction/horror film
- Event Horizon (sculpture), a 2007 site installation by Antony Gormley
- Event Horizon, a fictional company in the novels of the Greg Mandel trilogy by English science fiction writer Peter F. Hamilton
- Event Horizon (album), a 2012 album by I Am I
- Event Horizons BBS, a bulletin board system that ran from 1983 to 1996
- Event Horizon Software, the original name of American computer game developer DreamForge Intertainment
- "Event Horizon" (Supergirl), an episode of Supergirl
- "the event horizon", 2019 poem by Simon Armitage to commemorate opening of Halle St Peter's extension