Sphere

Sphere, geometrical object that is the surface of a ball.

Sphere image

A sphere (from Greek σφαῖρα—sphaira, "globe, ball") is a geometrical object in three-dimensional space that is the surface of a ball (viz., analogous to the circular objects in two dimensions, where a "circle" circumscribes its "disk"). Like a circle in a two-dimensional space, a sphere is defined mathematically as the set of points that are all at the same distance r from a given point in a three-dimensional space. This distance r is the radius of the ball, which is made up from all points with a distance less than (or, for a closed ball, less than or equal to) r from the given point, which is the center of the mathematical ball. These are also referred to as the radius and center of the sphere, respectively. The longest straight line segment through the ball, connecting two points of the sphere, passes through the center and its length is thus twice the radius; it is a diameter of both the sphere and its ball.

Sphere Within Sphere
5 months ago

Sphere Within Sphere ... Sphere Within Sphere (Sfera con sfera) is a bronze sculpture by Italian sculptor Arnaldo Pomodoro. Versions of the sculpture (diameters vary) can be seen...

Spectro-Polarimetric High-Contrast Exoplanet Research
3 months ago

Spectro-Polarimetric High-Contrast Exoplanet Research ... Spectro-Polarimetric High-contrast Exoplanet REsearch (VLT-SPHERE) is an adaptive optics system and coronagraphic facility at the Very Large Telescope...

The Sphere
5 months ago

The Sphere ... The Sphere (officially Große Kugelkaryatide N.Y., also known as Sphere at Plaza Fountain, WTC Sphere or Koenig Sphere) is a monumental cast bronze sculpture...

N-sphere
5 months ago

N-sphere ... In mathematics, an n-sphere is a topological space that is homeomorphic to a standard n-sphere, which is the set of points in (n + 1)-dimensional Euclidean...

Sphere packing in a sphere
5 months ago

Sphere packing in a sphere ... Sphere packing in a sphere is a three-dimensional packing problem with the objective of packing a given number of equal spheres inside a unit sphere. It...

Armillary sphere
5 months ago

Armillary sphere ... armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model of objects in the sky (on the celestial sphere), consisting...

Dyson sphere
6 months ago

Dyson sphere ... A Dyson sphere is a hypothetical megastructure that completely encompasses a star and captures a large percentage of its power output. The concept is a...

Bloch sphere
5 months ago

Bloch sphere ... In quantum mechanics and computing, the Bloch sphere is a geometrical representation of the pure state space of a two-level quantum mechanical system (qubit)...

Riemann sphere
4 months ago

Riemann sphere ... In mathematics, the Riemann sphere, named after Bernhard Riemann, is a model of the extended complex plane, the complex plane plus a point at infinity...

Greater East Asia Co-Prosperity Sphere
6 months ago

Greater East Asia Co-Prosperity Sphere ... The Greater East Asia Co-Prosperity Sphere (Japanese: 大東亜共栄圏, Hepburn: Dai Tōa Kyōeiken), or the GEACPS, was an imperialist concept which was developed...

Sphere of influence
5 months ago
Celestial sphere
5 months ago
Circle of a sphere
4 months ago
Public sphere
5 months ago
Bernal sphere
6 months ago
Sphere packing
5 months ago
Hoberman sphere
4 months ago
3-sphere
5 months ago
Sphere (disambiguation)
5 months ago
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