# Sphere (disambiguation)

A sphere is a three-dimensional object shaped like a ball; it may also refer to a sphere-like region or shell.
Sphere may also refer to:

## Astronomy

* Armillary sphere, a physical model of the celestial sphere
* Celestial sphere, the astronomical description of the sky
* 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)
* Dyson sphere, a hypothetical megastructure that encompasses a star and captures a large percentage of its solar power output
* Hill sphere, the spherical region around an astronomical body where the primary gravitational influence on an orbiting object is that body
* Spectro-Polarimetric High-Contrast Exoplanet Research (SPHERE) is an adaptive optics system and coronagraphic facility at the Very Large Telescope (VLT)
* 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
* SPHERES (Synchronized Position Hold, Engage, Reorient Experimental Satellites), a formation flight testbed developed by MIT's Space Systems Laboratory
* SPHEREx (Spectro-Photometer for the History of the Universe, Epoch of Reionization, and Ices Explorer), a proposed space telescope

## Human sciences

* Separate spheres, an ideological term referring to separation between a private sphere and a public sphere in some societies
* Sphere of influence, a metaphorical region of influence surrounding a country, person or concept

## Mathematics

* n-sphere, the set of points at fixed distance from a central point in n+1 dimensional space
* Spherical surface, the boundary of a sphere (also known simply as sphere in mathematics)
* Spherical volume, the region inside a sphere (also known as a ball in mathematics)
* Unit sphere, the set of points at a distance of 1 from a central point

## Arts, entertainment, and media
### Architecture

* Sunsphere

### Films

* Sphere (1998 film), a film based on Crichton's 1987 novel, starring Dustin Hoffman, Sharon Stone, and Samuel L. Jackson
* Sphere (2013 film), an animated short film

### Literature

* Sphere (novel), a 1987 science-fiction novel by Michael Crichton
* Spheres trilogy, three books by the philosopher Peter Sloterdijk
* De sphaera mundi (The Sphere), a medieval astronomy book by Johannes de Sacrobosco
* The Sphere (newspaper), a British weekly newspaper which ran between 1900 and 1964

### Music
#### Groups

* Sphere (American band), American jazz ensemble
* Sphere (Japanese band), a Japanese pop idol unit
* Sphere (Polish band), a death metal band from Poland

#### Albums and songs

* Sphere (album), a 2005 album by noise music artist Merzbow
* "Sphere", a song by John Frusciante and Josh Klinghoffer from their album A Sphere in the Heart of Silence (2004)
* Spheres (Delerium album)
* "Spheres" (instrumental), a 2007 single by Mike Oldfield
* Spheres (Pestilence album), 1993
* Spheres, an album by Daniel Hope
* Spheres 2, a 1994 album by Delerium

## Other uses

* Sphere, a parameter in prescribing corrective lenses
* Silver Sphere (born 1999), American singer-songwriter
* Sphere, an extraterrestrial artificial intelligence that allies with humans from Independence Day: Resurgence
* Spheres (TV series), a Korean animation
* Sphere (organization), a project launched in 1997 to develop a set of minimum standards in core areas of humanitarian assistance
* Sphere (website), a blog search engine
* Sphere, a rumored internal development name for the PlayStation Move controller
* Sphere 1, one of the earliest personal computers
* Sphere Books, a British paperback-publisher from the 1960s to the 1980s and the 2000s to today
* Sphere (venue), a sphere-shaped entertainment venue in Paradise, Nevada
* The Sphere, a 1971 large metallic sculpture in New York City
* The Sphere (social network), an online network for renting luxury properties
* The Spheres, a fictional planetary system in Coldplay's album Music of the Spheres