In astrophysics, an event horizon is a boundary in spacetime beyond which no signal can ever reach a given observer. Wolfgang Rindler coined the term in the 1950s.

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Facts from Wikidata (CC0). Image by Perhelion via Wikimedia Commons (CC BY-SA 3.0).

event horizon

boundary of a region of spacetime from which one cannot escape once entered

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Not who you're looking for? Others named event horizon: large-scale public sculpture installation · 1997 film directed by Paul W. S. Anderson · 2012 studio album by I Am I

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