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      • physics specialized the outer edge of a black hole, beyond which nothing, including light, can escape: Anything that falls through the event horizon effectively disappears from the universe.
      dictionary.cambridge.org/dictionary/english/event-horizon

      EVENT HORIZON | English meaning - Cambridge Dictionary

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  3. dictionary.cambridge.org › english › event-horizonEVENT HORIZON | English meaning - Cambridge Dictionary

    EVENT HORIZON definition: 1. the outer edge of a black hole, beyond which nothing, including light, can escape: 2. the outer…. Learn more.

    • Event Planning

      EVENT PLANNING definition: the task of planning large events...

  4. www.oed.com › dictionary › event-horizon_nevent horizon noun - Oxford English Dictionary

    What does the noun event horizon mean? There are two meanings listed in OED's entry for the noun event horizon . See ‘Meaning & use’ for definitions, usage, and quotation evidence.

  5. www.merriam-webster.com › dictionary › event horizonEvent horizon Definition & Meaning - Merriam-Webster

    Aug 9, 2024 · The meaning of EVENT HORIZON is the surface of a black hole : the boundary of a black hole beyond which nothing can escape from within it.

  6. en.wikipedia.org › wiki › Event_horizonEvent horizon - Wikipedia

    In astrophysics, an event horizon is a boundary beyond which events cannot affect an observer. Wolfgang Rindler coined the term in the 1950s. [1] In 1784, John Michell proposed that gravity can be strong enough in the vicinity of massive compact objects that even light cannot escape. [2]

  7. www.britannica.com › topic › event-horizon-black-holeEvent horizon | Definition, Explanation, & Facts | Britannica

    5 days ago · Event horizon, boundary marking the limits of a black hole. At the event horizon, the escape velocity is equal to the speed of light. Since general relativity states that nothing can travel faster than the speed of light, nothing inside the event horizon can ever escape beyond it, including light.

    • The Editors of Encyclopaedia Britannica

  8. www.oxfordreference.com › display › 10Event horizon - Oxford Reference

    Overview. event horizon. Quick Reference. The surface of a black hole. For a non-rotating black hole, it is a spherical boundary at the black hole's Schwarzschild radius where the escape velocity becomes equal to the speed of light, so no events occurring within it can be seen from outside.

  9. library.fiveable.me › event-horizonEvent horizon - Vocab, Definition, and Must Know Facts - Fiveable

    An event horizon is the boundary surrounding a black hole beyond which no light or other information can escape. It marks the point at which gravitational pull becomes so strong that escape velocity exceeds the speed of light.

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