Sphere (disambiguation)

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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

  • 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)
  • n-sphere, the set of points at fixed distance from a central point in n+1 dimensional space
  • Unit sphere, the set of points at a distance of 1 from a central point

In human sciences

  • Public sphere, an area where individuals can discuss social problems
  • Sphere of influence, a metaphorical region of influence surrounding a country, person or concept

In astronomy

  • 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
  • Spectro-Polarimetric High-Contrast Exoplanet Research (SPHERE) is an adaptive optics system and coronagraphic facility at the Very Large Telescope (VLT).
  • 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.

In music

Bands

Albums

In literature

In film and television

Other uses

  • The Sphere, a 1971 large metallic sculpture located between the twin towers of the former World Trade Center
  • 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 Project, a project launched in 1997 to develop a set of minimum standards in core areas of humanitarian assistance

See also

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