What does event horizon mean?

Definitions for event horizon
event hori·zon

Here are all the possible meanings and translations of the word event horizon.

GCIDE

  1. event horizonnoun

    the boundary surface surrounding a black hole, from outside of which nothing inside can be observed, because nothing inside that surface, even light, can escape beyond it. See also black hole and escape velocity.

Wiktionary

  1. event horizonnoun

    The gravitational sphere of a black hole within which the escape velocity is greater than the speed of light, causing time to practically stop.

  2. event horizonnoun

    A point of no return, by analogy to the astronomical usage

Freebase

  1. Event horizon

    In general relativity, an event horizon is a boundary in spacetime beyond which events cannot affect an outside observer. In layman's terms, it is defined as "the point of no return" i.e. the point at which the gravitational pull becomes so great as to make escape impossible. The most common case of an event horizon is that surrounding a black hole. Light emitted from beyond the horizon can never reach the outside observer. Likewise, any object approaching the horizon from the observer's side appears to slow down and never quite pass through the horizon, with its image becoming more and more redshifted as time elapses. The traveling object, however, experiences no strange effects and does, in fact, pass through the horizon in a finite amount of proper time. More specific types of horizon include the related but distinct absolute and apparent horizons found around a black hole. Still other distinct notions include the Cauchy and Killing horizon; the photon spheres and ergospheres of the Kerr solution; particle and cosmological horizons relevant to cosmology; and isolated and dynamical horizons important in current black hole research.

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Numerology

  1. Chaldean Numerology

    The numerical value of event horizon in Chaldean Numerology is: 5

  2. Pythagorean Numerology

    The numerical value of event horizon in Pythagorean Numerology is: 9

Examples of event horizon in a Sentence

  1. Freek Roelofs:

    There are lots of advantages to using satellites instead of permanent radio telescopes on Earth, as with the Event Horizon Telescope( EHT), in space, you can make observations at higher radio frequencies, because the frequencies from Earth are filtered out by the atmosphere.

Images & Illustrations of event horizon

  1. event horizonevent horizonevent horizonevent horizonevent horizon


Translations for event horizon

From our Multilingual Translation Dictionary

  • horyzont zdarzeńPolish
  • ఈవెంట్ హోరిజోన్Telugu

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