Circle vs. Sphere — What's the Difference?

A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre; equivalently it is the curve traced out by a point that moves in a plane so that its distance from a given point is constant. The distance between any point of the circle and the centre is called the radius.

A celestial body, or its apparent surface.

A round plane figure whose boundary (the circumference) consists of points equidistant from a fixed point (the centre)

A level of society.

A group of people with a shared profession, interests, or acquaintances

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.

Move all the way around (someone or something), especially more than once

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

A plane curve everywhere equidistant from a given fixed point, the center.

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

A planar region bounded by a circle.

Enclose in or as if in a sphere

Something, such as a ring, shaped like such a plane curve.

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

A circular or nearly circular course, circuit, or orbit:a satellite's circle around the earth.

A spherical object or figure.

A traffic circle.

A celestial body, such as a planet or star.

A series or process that finishes at its starting point or continuously repeats itself; a cycle.

The sky, appearing as a hemisphere to an observer

A group of people sharing an interest, activity, or achievement:well-known in artistic circles.

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

A territorial or administrative division, especially of a province, in some European countries.

A range or extent of knowledge, interest, or activity

A sphere of influence or interest; domain.

A social level or part of society or group

(Logic)A vicious circle.

A range of power or influence

To make or form a circle around:The hedge circles the fountain.

To form into a sphere.

To move in a circle around:The ship circled the island.

To put in or within a sphere.

To move in a circle.

(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

(geometry) A two-dimensional geometric figure, a line, consisting of the set of all those points in a plane that are equally distant from a given point (center).

A spherical physical object; a globe or ball.

A two-dimensional geometric figure, a disk, consisting of the set of all those points of a plane at a distance less than or equal to a fixed distance (radius) from a given point.

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

Any shape, curve or arrangement of objects that approximates to or resembles the geometric figures.

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).

Any thin three-dimensional equivalent of the geometric figures.

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

A curve that more or less forms part or all of a circle.

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

A specific group of persons; especially one who shares a common interest.

(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 .

The orbit of an astronomical body.

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

(cricket) A line comprising two semicircles of 30 yards radius centred on the wickets joined by straight lines parallel to the pitch used to enforce field restrictions in a one-day match.

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

(Wicca) A ritual circle that is cast three times deosil and closes three times widdershins either in the air with a wand or literally with stones or other items used for worship.

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

A traffic circle or roundabout.

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

(obsolete) Compass; circuit; enclosure.

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

(astronomy) An instrument of observation, whose graduated limb consists of an entire circle. When fixed to a wall in an observatory, it is called a mural circle; when mounted with a telescope on an axis and in Y's, in the plane of the meridian, a meridian or transit circle; when involving the principle of reflection, like the sextant, a reflecting circle; and when that of repeating an angle several times continuously along the graduated limb, a repeating circle.

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 series ending where it begins, and repeating itself.

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

(logic) A form of argument in which two or more unproved statements are used to prove each other; inconclusive reasoning.

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

Indirect form of words; circumlocution.

Rank; order of society; social positions.

A territorial division or district.

An orbit, as of a star; a socket.

(in the plural) A bagginess of the skin below the eyes from lack of sleep.

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

(transitive) To travel around along a curved path.

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

(transitive) To surround.

A particular environment or walk of life;

(transitive) To place or mark a circle around.

Any spherically shaped artifact

(intransitive) To travel in circles.

The geographical area in which one nation is very influential

A plane figure, bounded by a single curve line called its circumference, every part of which is equally distant from a point within it, called the center.

A particular aspect of life or activity;

The line that bounds such a figure; a circumference; a ring.

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

An instrument of observation, the graduated limb of which consists of an entire circle.

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

A round body; a sphere; an orb.

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

Compass; circuit; inclosure.

A round three-dimensional object where every point on the surface is equidistant from the center.

A company assembled, or conceived to assemble, about a central point of interest, or bound by a common tie; a class or division of society; a coterie; a set.

A field or domain of activity or expertise.

A circular group of persons; a ring.

A group or community having a common environment.

A series ending where it begins, and repeating itself.

A form of argument in which two or more unproved statements are used to prove each other; inconclusive reasoning.

Indirect form of words; circumlocution.

A territorial division or district.

To move around; to revolve around.

To encompass, as by a circle; to surround; to inclose; to encircle.

To move circularly; to form a circle; to circulate.

Ellipse in which the two axes are of equal length; a plane curve generated by one point moving at a constant distance from a fixed point;

An unofficial association of people or groups;

Something approximating the shape of a circle;

Movement once around a course;

A road junction at which traffic streams circularly around a central island;

Street names for flunitrazepan

A curved section or tier of seats in a hall or theater or opera house; usually the first tier above the orchestra;

Any circular or rotating mechanism;

Travel around something;

Move in circles

Be around;

Form a circle around;

A flat, closed curve where all points are equidistant from the center.

A line forming a closed curve.

A group of people with shared interests or characteristics.

A process or argument that ends where it began, without making progress.

A series or sequence that returns to its starting point.

No, while they share the concept of radius, their formulas differ due to their dimensional differences.

No, a circle is flat and exists in two dimensions only.

While all balls are spheres, not all spheres are balls. A ball is a tangible object, while a sphere is a geometric shape.

A sphere is a three-dimensional object, while a circle is two-dimensional.

The boundary of a circle is called its circumference.

"Sphere" can refer to fields of activity, celestial bodies, levels of society, or common environments.

The circumference is π times the diameter.

Basketballs, planets, and soap bubbles are examples of spheres.

A circle is a two-dimensional flat shape where all points are equidistant from its center.

No, while you can draw a representation or cross-section of a sphere (like a circle), an actual sphere is three-dimensional.

Yes, "circle" can mean a group of people with shared interests or characteristics.

A sphere has more dimensions (three) compared to a circle (two).