Phrase Hound found 32 phrases and 14 compound words that contain horizon. The most common are listed below. Open horizon in the live search for definitions, filters, and the full list.
Phrases 32
- event horizonThe gravitational sphere of a black hole within which the escape velocity is greater than the speed of light.
- time horizonA fixed point of time in the future where certain processes will be evaluated or assumed to end.
- horizon problemThe cosmological fine-tuning problem of explaining the observed homogeneity of causally disconnected regions of space in the absence of a mechanism that sets the same initial conditions everywhere.
- Horizon DeepA deep in Tonga Trench, Pacific Ocean; the second deepest place on Earth, and deepest part of the Tonga Trench.
- archaeological horizonA common set of artefacts that identifies a culture and is found disseminated widely (usually over a number of sites, but sometimes widely over one site) but restricted to a single stratum; a layer or stratum.
- artificial horizonAn instrument that displays the pitch and roll of an aircraft in flight by comparing its attitude to a gyroscopically-maintained indication of the flat horizon line.
- absolute horizonA boundary in spacetime, defined with respect to the external universe, inside which events cannot affect an external observer.
- apparent horizonA surface that is the boundary between lightrays that are directed outwards and moving outwards and those directed outward but moving inward.
- horizon effectA problem in artificial intelligence whereby a computer can only search a small portion of the possible states in a game, and thus may make a detrimental move because it cannot search far enough to see its error.
- isolated horizonIn the context of black holes, a null hypersurface (a surface where light rays travel) that is in equilibrium with its surrounding environment.
- Killing horizonA geometrical construct used in general relativity and its generalizations to delineate spacetime boundaries without reference to the dynamic Einstein field equations.
- particle horizonA cosmological horizon.
- radar horizonA critical area of performance for aircraft detection systems, defined by the distance at which the radar beam rises enough above the Earth's surface to make detection of a target at low level impossible.
- split horizonA method of preventing routing loops in distance-vector routing protocols by prohibiting a router from advertising a route back onto the interface from which it was learned.
- marker horizonA stratigraphic unit of distinctive lithology with a wide geographical extent used in stratigraphic correlation.
- rational horizoncelestial horizon
- cosmological horizonThe distance from an observer in a universe beyond which it is impossible for the observer to see, as the light (or other luminal particles) cannot have travelled that distance over the current age of that universe.
- Cauchy horizonA lightlike boundary of the domain of validity of a Cauchy problem, in which one side of the horizon contains closed space-like geodesics and the other side contains closed timelike geodesics.
- dynamical horizonA mathematical concept in general relativity that describes a boundary in spacetime where the expansion of one null direction is zero and the expansion of the other null direction is negative.
- Hubble horizonSynonym of cosmological horizon: The distance from an observer in a universe beyond which it is impossible for the observer to see, as the light (or other luminal particles) cannot have travelled that distance over the current age of that …
- cosmic event horizonThe cosmological horizon; the edge of the observable universe.
- cosmic light horizonSynonym of cosmological horizon: The distance from an observer in a universe beyond which it is impossible for the observer to see, as the light (or other luminal particles) cannot have travelled that distance over the current age of that …
- horizon glassA half-silvered piece of glass mounted in a quadrant or sextant, so that the horizon can be seen at the same time as the reflection of a heavenly body.
- horizon effectsplural of horizon effect: A problem in artificial intelligence whereby a computer can only search a small portion of the possible states in a game, and thus may make a detrimental move because it cannot search far enough to see its error.
- moral event horizonA pivotal moment in a story when a character commits an act so heinous that it renders them irredeemably evil in the eyes of the audience and other characters.
Compound words 14
- horizonalRelating to a horizon.
- antihorizonThe opposite of an event horizon, allowing escape but not entry.
- circumhorizonAround the horizon.
- horizonlessWithout a horizon.
- horizonwardToward the horizon.
- horizonwardsTowards the horizon.
- subhorizonBelow a horizon.
- superhorizonLarger than the cosmological horizon
- unhorizonedunlimited (having no limit)
- horizontalPerpendicular to the vertical; parallel to the plane of the horizon; level, flat.