event horizon

noun

: the surface of a black hole : the boundary of a black hole beyond which nothing can escape from within it

Examples of event horizon in a Sentence

Recent Examples on the Web

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Now, the white dwarf might be orbiting within millions of miles of the black hole’s event horizon—the point beyond which no matter or light can escape. —

Sara Hashemi, Smithsonian Magazine, 14 Jan. 2025 The event horizon is the point around every black hole at which gravity becomes so strong not even light is fast enough to escape. —

Robert Lea, Space.com, 13 Jan. 2025 Trippe says the system would open a completely new window into the processes taking place in the vicinity of the black holes' event horizons, the boundaries from beyond which nothing escapes. —

Tereza Pultarova, Space.com, 4 Jan. 2025 That is because, like all black holes, they are bounded by a one-way light-trapping surface called an event horizon. —

Robert Lea, Space.com, 19 Dec. 2024 See all Example Sentences for event horizon

Word History

First Known Use

1956, in the meaning defined above

Time Traveler

The first known use of event horizon was in 1956

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Style

“Event horizon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/event%20horizon. Accessed 26 Jan. 2025.

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