event horizon

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English

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Pronunciation

  • (General American) IPA(key): /əˈvɛnt həˈɹaɪ.zən/, /-zɪn/, , ,
  • (file)

Noun

event horizon (plural event horizons)

  1. (astrophysics) The gravitational sphere of a black hole within which the escape velocity is greater than the speed of light.
  2. (by extension) A point of no return.

Coordinate terms

(astrophysics):

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Further reading