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The '''Celestial Sphere''' is an imaginary round surface with an infinite radius on which all objects in the [[sky]] can be thought to be placed.  The concept is used in navigation and an early form of [[astronomy]].

The '''Celestial Sphere''' is the view of the sky, from Earth. Because the human eye cannot perceive the distance away from Earth, the Sun, Moon, stars, and planets all appear as if they are on a giant sphere centered at the Earth.

This point of reference is used in basic physics to simplify calculations, and provides results which are accurate enough to use in [[kinetic projectile modelling]]. The art of [[throw]]ing [[stuff]] at other stuff relies on the understanding that the celestial sphere was created on [[day]] [[four]], and that the [[star]]s can be used to measure [[latitude]] and [[longitude]]. When [[gyroscopes]] are employed in the stabilization of moving objects, greater accuracy can be achieved. The combination of gyroscopes and [[stellar navigation]] is used in [[aircraft]] flight, and in [[rocket science]].

==See Also:==

==See Also:==

[[Frame of reference]]

[[Frame of reference]]

[[Category:Meteorology]]

[[Category:Meteorology]]

[[Category:Physics]]

[[Category:Physics]]