event horizon


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event horizon

The boundary of a black hole: for a nonrotating black hole it is a spherical ‘surface’ having a radius equal to the Schwarzschild radius for a body of a given mass. The event horizon marks the critical limit where the escape velocity of a collapsing body becomes equal to the speed of light and hence no information can reach an external observer. Calculations predict that a body shrinking within its event horizon – or indeed any body that falls inside the event horizon of another – inevitably contracts to a singularity at the precise center of the black hole.

event horizon

[i′vent hə‚rīz·ən]
(relativity)
The boundary of a region of space-time from which it is not possible to escape to infinity. Symbolized +.
References in periodicals archive ?
Our motive is not so much to establish that there is a hard surface," Kumar said, "but to push the boundary of knowledge and find concrete evidence that really, there is an event horizon around black holes.
Theoretically, at the event horizon your image would freeze.
The Event Horizon Spectrum will offer flavorful variants on our classic take of the imperial stout.
Some theorists claim that infalling matter can arrive at the event horizon of a pre-existing black hole in finite proper time, but in practice this is forbidden by the existence of inviolable temporal relationships that permeate spacetime [13].
u] [right arrow] 0 the Killing horizon H will be equivalent to an event horizon at null infinity, which proves (c).
Because [Albert] Einstein's general theory of relativity does not choose a time orientation, if a black hole can form from the gravitational collapse of matter through an event horizon in the future, then the reverse process is also possible.
The concept that began two years ago in the Middle East is operated by Event Horizon and Mindset Media and will be launched on October 4.
From the writer of EVENT HORIZON comes the visually stunning and nerve-shatteringly exciting science-fiction action thriller, MUTANT CHRONICLES, starring Thomas Jane and Sean Pertwee.
Thankfully, the talentless director of Event Horizon and Mortal Kombat is only writer-producer here, as he has been busy making Alien Vs Predator.
To aid in grappling with such events, law enforcement administrators need to examine the fundamentals of planning and consider employing a method for envisioning an end state that combines identifying the event horizon and reviewing scenarios of possible outcomes.
If you've seen Event Horizon, then this has the same premise - an enigmatic spacecraft causes nightmares for the crew of the eponymous space station.