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Pronunciation varies by accent · noun
(astrophysics) The opposite of an event horizon, allowing escape but not entry..
White holes must therefore be surrounded by the opposite of an event horizon, something known as an antihorizon, which would allow one-way traffic out and never in. Unfortunately, antihorizons are very unstable and get converted to normal horizons in a matter of seconds after forming.
The Kruskal diagram of the Schwarzschild geometry showed it to possess not only a normal horizon but also an antihorizon, beyond which there was, supposedly, another Universe.
To distant observers the light appears, due to gravitational time dilation, to slow down as it approaches the antihorizon.
Use antihorizon when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Antihorizon means (astrophysics) The opposite of an event horizon, allowing escape but not entry..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
White holes must therefore be surrounded by the opposite of an event horizon, something known as an antihorizon, which would allow one-way traffic out and never in. Unfortunately, antihorizons are very unstable and get converted to normal horizons in a matter of seconds after forming.
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