[1] : WordNet (r) 2.0

celestial sphere
     n : the apparent surface of the imaginary sphere on which
         celestial bodies appear to be projected syn: sphere, empyrean,
          firmament, heavens, vault of heaven, welkin
see also:
sphere empyrean firmament heavens vault of heaven welkin 

Celestial >> C Words
Celestial, definition of term: Celestial
celestial_pag1.html

Sphere >> S Words
Sphere, definition of term: Sphere
sphere_pag1.html

Celestial Spher >> C Words
Celestial Spher, definition of term: Celestial Spher
celestial+spher_pag1.html

Celestial Poles >> C Words
Celestial Poles, definition of term: Celestial Poles
celestial+poles_pag1.html

Celestial Pole >> C Words
Celestial Pole, definition of term: Celestial Pole
celestial+pole_pag1.html

Celestial Equat >> C Words
Celestial Equat, definition of term: Celestial Equat
celestial+equat_pag1.html

Sphere Of Influ >> S Words
Sphere Of Influ, definition of term: Sphere Of Influ
sphere+of+influ_pag1.html