An event horizon is a boundary around a black hole inside which events cannot affect an outside observer.

Look up event horizon in Wiktionary, the free dictionary.

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

• Event Horizon Telescope, international collaborative project
• Horizon (general relativity)

This disambiguation page lists articles associated with the title Event horizon.
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