Sphere (disambiguation)

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

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 (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).

In Earth and planetary sciences

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

Figurative and 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 (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

Music

• Sphere (American band), American jazz ensemble
• Sphere (Japanese band), a Japanese pop idol unit
• Sphere (Polish band), a death metal band from Poland
• Sphere3, a Progressive Rock/Jazz Fusion band

Album

• 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
• Spheres, album by Daniel Hope

Song

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

See also

• Sfera (disambiguation)