KnowraEvent horizonLinked fromLinked fromThe 32 pages that link to Event horizon, each with the reason it gives.All 32Broader topic 13Related 16Narrower topic 1Compared with 2Black 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.Schwarzschild metricBroader topic: At the Schwarzschild radius, the metric's coordinate description marks the horizon of a black hole.Black hole thermodynamicsBroader topic: Its area enters the entropy formula, and its causal boundary underlies Hawking radiation.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.Intermediate-mass black holeBroader topic: The horizon's size scales with mass, although it is not directly resolved for these distant objects.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.