Sphere (disambiguation)

Look up sphere in Wiktionary, the free dictionary.

A sphere is an object shaped like a ball and can also be used to refer to a sphere-like region or shell.

Sphere may also refer to:

In mathematics

Ball (mathematics), the volume inside a sphere
n-sphere, the set of points at fixed distance from a central point in n+1 dimensional space

Celestial sphere, the astronomical description of the sky
Armillary sphere, a physical model of the celestial sphere
Celestial spheres or planetary spheres, refer to a geocentric model of the universe and the associated postulate of a "Musica Universalis" (Music of the Spheres)
Hill sphere, the spherical region around an astronomical body where the primary gravitational influence on an orbiting object is that body
Sphere of influence (astrodynamics), similar to the Hill sphere, but smaller, only about 60% of the radius
Sphere of influence (black hole), a region around a supermassive black hole

A type of spherical stone (Stone balls):

Artificial stone spheres (Petrospheres)
- Lapidary spheres
- Stone Round shot (cannonballs)
- Spherical stone shot for Trebuchets
- Stone spheres of Costa Rica
- Carved Stone Balls
Natural stone spheres
- Spherulites (Megaspherulites)
- Concretions (cannonball)
- Spheroidal weathering that creates spherical corestones

Noosphere, the sphere of human thought and/or creativity
Sphere of influence, a metaphorical region of influence surrounding a country, person or concept
Cultural region

De sphaera mundi (The Sphere), a medieval astronomy book by Johannes de Sacrobosco
The Sphere, a 1971 large metallic sculpture located between the twin towers of the former World Trade Center
The Sphere (newspaper), a British weekly newspaper which ran between 1900 and 1964
Sphere Books, a British paperback-publisher from the 1960s to the 1980s
Sphere (novel), a 1987 book written by Michael Crichton
Sphere (1998 film), a film based on the 1987 novel, starring Dustin Hoffman, Sharon Stone and Samuel L. Jackson
Sphere (2013 film), an animated short film
Spheres (TV series), a Korean animation
SPHERE, an instrumentation project at the Very Large Telescope (VLT) to directly image extrasolar planets
SPHERES, Synchronized Position Hold, Engage, Reorient Experimental Satellites formation flight testbed developed by MIT's Space Systems Laboratory
Sphere (website), the blog search engine
Dresspheres in the game Final Fantasy X-2 are used to change character classes
Sphere, a rumored internal development name for the PlayStation Move controller

"Sphere", a song by John Frusciante and Josh Klinghoffer from their 2004 album A Sphere in the Heart of Silence