The Celestial Sphere

    Definitions

  • Celestial Sphere: The Imaginary Sphere Surrounding The Earth Onto Which The Stars Appear Affixed, And Which Appears To Rotate Around The Earth….

  • Altitude: The Angular Distance Of An Object Above The Horizon….

  • Azimuth: The Angular Distance Of An Object Along The Horizon, Measured From Due North In An Eastward Direction….

  • Zenith: The Point In The Sky Directly Above You..

  • Nadir: The Point In The Sky Directly Below You…

  • Meridian: An Imaginary North-South Line In The Sky Passing Directly Overhead. It Divides The Sky Into Eastern And Western Halves….

 

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