Sector vs. Sphere — What's the Difference?

An area or portion that is distinct from others

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.

The plane figure enclosed by two radii of a circle or ellipse and the arc between them.

A round solid figure, or its surface, with every point on its surface equidistant from its centre.

A mathematical instrument consisting of two arms hinged at one end and marked with sines, tangents, etc. for making diagrams.

An area of activity, interest, or expertise; a section of society or an aspect of life distinguished and unified by a particular characteristic

A part or division, as of a city or a national economy

Enclose in or as if in a sphere

The portion of a circle bounded by two radii and the included arc.

(Mathematics) A three-dimensional surface, all points of which are equidistant from a fixed point.

A measuring instrument consisting of two graduated arms hinged together at one end.

A spherical object or figure.

(Computers) A portion of a storage device making up the smallest addressable unit of information.

A celestial body, such as a planet or star.

A division of a defensive position for which one military unit is responsible.

The sky, appearing as a hemisphere to an observer

A division of an offensive military position.

Any of a series of concentric, transparent, revolving globes that together were once thought to contain the moon, sun, planets, and stars.

To divide (something) into sectors.

A range or extent of knowledge, interest, or activity

Section

A social level or part of society or group

Zone (designated area).

A range of power or influence

(geometry) part of a circle, extending to the center; circular sector

To form into a sphere.

(computer hardware) fixed-sized unit (traditionally 512 bytes) of sequential data stored on a track of a digital medium (compare to block)

To put in or within a sphere.

(military) an area designated by boundaries within which a unit operates, and for which it is responsible

(mathematics) A regular three-dimensional object in which every cross-section is a circle; the figure described by the revolution of a circle about its diameter . Category:en:Surfaces

(military) one of the subdivisions of a coastal frontier

A spherical physical object; a globe or ball.

(science fiction) a fictional region of space designated for navigational or governance purposes.

The apparent outer limit of space; the edge of the heavens, imagined as a hollow globe within which celestial bodies appear to be embedded.

(calculation) an instrument consisting of two rulers of equal length joined by a hinge.

Any of the concentric hollow transparent globes formerly believed to rotate around the Earth, and which carried the heavenly bodies; there were originally believed to be eight, and later nine and ten; friction between them was thought to cause a harmonious sound (the music of the spheres).

A field of economic activity

(mythology) An area of activity for a planet; or by extension, an area of influence for a god, hero etc.

(engineering) A toothed gear whose face is the arc of a circle.

(figuratively) The region in which something or someone is active; one's province, domain.

(motor racing) A fixed, continuous section of the track, such that sectors do not overlap but all sectors make up the whole track.

(geometry) The set of all points in three-dimensional Euclidean space (or n-dimensional space, in topology) that are a fixed distance from a fixed point .

(climbing) An area of a crag, consisting of various routes

(logic) The extension of a general conception, or the totality of the individuals or species to which it may be applied.

A part of a circle comprehended between two radii and the included arc.

(transitive) To place in a sphere, or among the spheres; to ensphere.

A mathematical instrument, consisting of two rulers connected at one end by a joint, each arm marked with several scales, as of equal parts, chords, sines, tangents, etc., one scale of each kind on each arm, and all on lines radiating from the common center of motion. The sector is used for plotting, etc., to any scale.

(transitive) To make round or spherical; to perfect.

An astronomical instrument, the limb of which embraces a small portion only of a circle, used for measuring differences of declination too great for the compass of a micrometer. When it is used for measuring zenith distances of stars, it is called a zenith sector.

A body or space contained under a single surface, which in every part is equally distant from a point within called its center.

A plane figure bounded by two radii and the included arc of a circle

Hence, any globe or globular body, especially a celestial one, as the sun, a planet, or the earth.

A body of people who form part of society or economy;

The apparent surface of the heavens, which is assumed to be spherical and everywhere equally distant, in which the heavenly bodies appear to have their places, and on which the various astronomical circles, as of right ascension and declination, the equator, ecliptic, etc., are conceived to be drawn; an ideal geometrical sphere, with the astronomical and geographical circles in their proper positions on it.

A particular aspect of life or activity;

The extension of a general conception, or the totality of the individuals or species to which it may be applied.

The minimum track length that can be assigned to store information; unless otherwise specified a sector of data consists of 512 bytes

Circuit or range of action, knowledge, or influence; compass; province; employment; place of existence.

A portion of a military position

Rank; order of society; social positions.

Measuring instrument consisting of two graduated arms hinged at one end

An orbit, as of a star; a socket.

To place in a sphere, or among the spheres; to insphere.

To form into roundness; to make spherical, or spheral; to perfect.

A particular environment or walk of life;

Any spherically shaped artifact

The geographical area in which one nation is very influential

A particular aspect of life or activity;

A solid figure bounded by a spherical surface (including the space it encloses)

A three-dimensional closed surface such that every point on the surface is equidistant from the center

The apparent surface of the imaginary sphere on which celestial bodies appear to be projected