Astrophysics (index)about

Celestial Sphere

(the sky in considered as a sphere surrounding the observer)

The Celestial Sphere is the imaginary sphere around an observer, representing the position of stars and astronomical bodies the observer can see by looking in different directions, around and up. The sky hidden "under" the Earth is easily considered a hidden part of the same sphere.

Latitude- and longitude-like coordinates, Right Ascension and Declination, can be used to identify the position of stars on the celestial sphere.


(astronomy,sky,coordinates)
http://en.wikipedia.org/wiki/Celestial_sphere

Referenced by:
Alpha Centauri
Adaptive Optics (AO)
Arakelian Catalog (Ark)
Astrometry
Baade's Window
Bayer Designation
Blind Survey
Celestial Equator
Cosmic Microwave Background (CMB)
Continuous Viewing Zone (CVZ)
Declination (dec)
Ecliptic
Ecliptic Coordinate System
Epicycle
Equatorial Coordinate System
Fsky (fsky)
Galactic Coordinate System
Galactic Plane
Gould's Belt
Guide Star Catalog (GSC)
Gravitational Wave (GW)
Heliocentric System
HIPASS
Holmberg Radius
Horizontal Coordinate System
Lockman Hole
Magnetic Energy Spectrum
Meridian
Meteoroid
Moving-Cluster Method
Nebula
N-Point Function
Opposition
Plate Scale
Position Angle
Provisional Designation
PSF Fitting
Redshift-angular Size Relation
Right Ascension (RA)
Radio Source (RS)
Sidereal
SIMSTACK
Solar Apex
Solar Time
Solid Angle (Ω)
Solstice
Spherical Harmonics
Supergalactic Coordinate System
Surface Brightness
Survey-based Designator
Survey Field
Synoptic
Transit Telescope
Westerhout Radio Survey (W)

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