Linked from

The 32 pages that link to Event horizon, each with the reason it gives.

• Black holeBroader topic: It marks the point of no return around a black hole.

• Active galactic nucleusBroader topic: It marks the central black hole, though most observable power is emitted by surrounding matter.

• Supermassive black holeBroader topic: It marks the limit at which infalling matter and light cease to affect distant observers.

• Event Horizon TelescopeRelated: It gives the telescope its name, though an image does not show the boundary directly.

• Light coneRelated: A horizon marks where the global arrangement of light cones prevents escape.

• Hawking radiationRelated: The horizon’s causal structure underlies the particle emission seen far away.

• HorizonCompared with: Unlike the visible Earth–sky boundary, it is a causal limit rather than an optical appearance.

• Black hole information paradoxRelated: Hawking’s calculation treats the horizon as separating radiation from inaccessible interior partners.

• Schwarzschild metricBroader topic: At the Schwarzschild radius, the metric's coordinate description marks the horizon of a black hole.

• Kerr metricRelated: The Kerr solution has an outer event horizon whose radius depends on mass and spin.

• Black hole thermodynamicsBroader topic: Its area enters the entropy formula, and its causal boundary underlies Hawking radiation.

• Schwarzschild radiusRelated: The Schwarzschild radius locates this boundary for a Schwarzschild black hole.

• Stephen HawkingRelated: Quantum effects near this boundary underpin the prediction of Hawking radiation.

• Cosmic censorship hypothesisRelated: The horizon is the proposed barrier between collapse singularities and distant observers.

• Causal structureBroader topic: It is defined globally by which causal signals can reach infinity.

• Holographic principleBroader topic: A black hole’s horizon is the surface whose area measures its entropy.

• Coordinate singularityRelated: The Schwarzschild chart becomes singular at this boundary, though the horizon itself is regular.

• Intermediate-mass black holeBroader topic: The horizon's size scales with mass, although it is not directly resolved for these distant objects.

• Penrose diagramRelated: Its position separates regions that can communicate with infinity from those that cannot.

• Karl SchwarzschildRelated: The Schwarzschild radius marks the horizon in the nonrotating, uncharged case.

• Gravitational singularityCompared with: A horizon can hide a singularity but is not itself a singularity.

• Kerr–Newman metricRelated: The metric’s parameters determine whether horizons exist and where they lie.

• Penrose processRelated: The negative-energy fragment crosses this boundary, reducing the black hole’s mass and spin.

• No-hair theoremRelated: The horizon separates the black-hole interior from the exterior whose properties the theorem classifies.

• Penrose–Hawking singularity theoremsRelated: Theorems establish incompleteness without generally locating it relative to an event horizon.

• Stellar black holeBroader topic: It marks the defining boundary of the black hole left by stellar collapse.

• Sagittarius A*Broader topic: It marks the boundary of the black hole associated with this radio source.

• Astronomical black holesBroader topic: It marks the point of no return around a black hole.

• Black hole astronomyBroader topic: Its scale and shadow shape the black hole’s observable appearance.

• Micro black holeBroader topic: Even a microscopic black hole is defined by the horizon trapping outward signals.

• Rotating black holeNarrower topic: The rotating black hole’s horizon is shaped by its mass and spin.

• White holeRelated: A white hole horizon permits outward passage while forbidding inward passage.