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 a fixed distance from a central point in n+1 dimensional space

In sociology

• Public sphere, an area where individuals can discuss social problems

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 (astronomy), a region around a supermassive black hole

In Earth science/planetary science

• Atmosphere
  • Earth's atmosphere/Celestial body atmospheres
    • Troposphere
    • Stratosphere
    • Mesosphere
    • Thermosphere
    • Exosphere
    • Magnetosphere
• Biosphere
  • Anthroposphere
• Hydrosphere
  • Cryosphere (sometimes included in the hydrosphere)
• Geosphere
  • Lithosphere
    • Pedosphere (Soil)
    • Crust (geology)
  • Mantle (geology)
    • Asthenosphere
    • Mesosphere (mantle)
  • Planetary core
    • Inner core
    • Outer core

In stellar physics

• The layers of a star, in particular of the Sun
  • Solar core
  • Radiation zone
  • Convection zone
  • Photosphere
  • Chromosphere
  • Corona

In geology

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 of Scotland
• Natural stone spheres
  • Spherulites (Megaspherulites)
  • Concretions (cannonball)
  • Spheroidal weathering that creates spherical corestones

Figurative/metaphorical

• 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

Popular culture

• 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 (film), a 1998 film based on the 1987 novel, starring Dustin Hoffman, Sharon Stone and Samuel L. Jackson
• 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

Music

• Sphere (band), American jazz ensemble
• Sphere3, a Progressive Rock/Jazz Fusion band
• Sphere (Japanese band), a Japanese pop idol unit
• Sphere (album), a 2005 album by noise music artist Merzbow
• "Spheres" (instrumental), a 2007 single by Mike Oldfield
• Spheres (Pestilence album), 1993
• Spheres (Delerium album)
  • Spheres 2, a 1994 album by Delerium
• "Sphere", a song by John Frusciante and Josh Klinghoffer from their 2004 album A Sphere in the Heart of Silence

See also

• Sfera (disambiguation)

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.