# Opinions on **Sphere**

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A **sphere** (from Greek σφαῖρα — *sphaira*, "globe, ball") is a perfectly round geometrical and circular object in three-dimensional space that resembles the shape of a completely round ball. Like a circle, which, in geometric contexts, is in two dimensions, a sphere is defined mathematically as the set of points that are all the same distance *r* from a given point in three-dimensional space. This distance *r* is the radius of the sphere, and the given point is the center of the sphere. The maximum straight distance through the sphere passes through the center and is thus twice the radius; it is the diameter.

In mathematics, a distinction is made between the sphere (a two-dimensional closed surface embedded in three-dimensional Euclidean space) and the ball (a three-dimensional shape that includes the interior of a sphere).

**^**σφαῖρα, Henry George Liddell, Robert Scott,*A Greek-English Lexicon*, on Perseus

In the image below, you can see a graph with the evolution of the times that people look for Sphere. And below it, you can see how many pieces of news have been created about Sphere in the last years.

Thanks to this graph, we can see the interest Sphere has and the evolution of its popularity.

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