Phrase Hound found 29 phrases and 231 compound words that contain sphere. The most common are listed below. Open sphere in the live search for definitions, filters, and the full list.
Phrases 29
- sphere of influenceA spatial region over which a state has a level of cultural, economic, military or political exclusivity.
- celestial sphereThe apparent outer limit of space; an abstract sphere of infinite radius which serves as the imaginary backdrop for celestial objects, and of which the visible sky is one hemisphere.
- Public Sphere
- sphere of knowledgeA unified body or collection of knowledge regarding a specific subject.
- armillary sphereAn instrument consisting of graduated metal circles used to represent the motions of celestial bodies around the earth.
- photon sphereOf a black hole, a spherical limit around a black hole at such distance that any photon meeting it tangentially is constrained to travel in a circular orbit; (more loosely) the region between this limit and the event horizon.
- sphere packingThe arranging of non-overlapping spheres in space
- unit sphereA sphere with a radius of 1 unit.
- Riemann sphereThe complex numbers extended with the number ∞; the complex plane (representation of the complex numbers as a Euclidean plane) extended with a single idealised point at infinity and consequently homeomorphic to a sphere in 3-dimensional …
- Dyson sphereA hypothetical system of orbiting solar power satellites meant to completely encompass a star and capture its entire energy output.
- crystal sphereA crystal ball.
- exotic sphereA manifold (of any dimension) homeomorphic to a sphere but not diffeomorphic to the standard sphere.
- Hill sphereThe region in which a given astronomical body dominates the attraction of satellites.
- n-sphereAn n-dimensional hypersphere: the 2-sphere is a circle, the 3-sphere is the usual sphere, the 4-sphere is a glome, etc.
- Roche sphereSynonym of Hill sphere: The region in which a given astronomical body dominates the attraction of satellites.
- homology sphereA manifold whose homology is the same as that of some sphere of the same dimension
- Hubble sphereHubble volume
- Bloch sphereA geometrical representation of the pure state space of a two-level quantum-mechanical system, or qubit.
- Laplace sphereThe region around a planet in which a satellite would maintain an orbit around the planet instead of its star.
- Alexander horned sphereA pathological object, a certain embedding of a sphere in three-dimensional Euclidean space, obtained by various modifications of a torus.
- Debye sphereA volume whose radius is the Debye length, in which there is a sphere of influence, and outside of which charges are electrically screened.
- Klerksdorp sphereA small object, often spherical to disc-shaped, found in three-billion-year-old pyrophyllite deposits mined near Ottosdal in South Africa, and thought to have originated as concretions in ancient accumulated volcanic sediments or ash.
- sublunary sphereIn geocentric cosmologies, that region of the cosmos from the centre of the Earth to the moon, believed to comprise the four classical elements (earth, air, fire and water) and to be subject to generation and corruption.
- fold sphereA fold mirror that is a "sphere", i.e. a spherical mirror
- diving sphereSynonym of bathysphere: A spherical steel deep-diving chamber with perspex windows, in which persons are lowered to the depths by a cable to study the oceans and deep-sea life; the precursor to the bathyscaphe.
Compound words 231
- atmosphereThe gases surrounding the Earth or any astronomical body.
- hemisphereHalf of the celestial sphere, as divided by either the ecliptic or the celestial equator .
- blogosphereThe totality of blogs, especially the unique jargon, cultures and shared interests created by their interconnection.
- stratosphereThe region of the uppermost atmosphere where the temperature increases along with the altitude due to the absorption of solar ultraviolet radiation by ozone.
- ionosphereThe part of the Earth's atmosphere beginning at an altitude of about 50 kilometers (31 miles) and extending outward 500 kilometers (310 miles) or more.
- troposphereThe lower levels of the atmosphere extending from the surface of the Earth or another celestial body up to the tropopause. It is characterized by convective air movements and a large vertical temperature change.
- lithosphereThe rigid, mechanically strong, outer layer of the Earth, which is divided into twelve major tectonic plates.
- hydrosphereAll the liquid waters of the Earth or another astronomical body, as distinguished from the land and the gases of the atmosphere.
- photosphereA visible surface layer of a star, and especially that of a sun.
- mesosphereThe layer of the Earth's atmosphere that is directly above the stratosphere and directly below the thermosphere.