Definition:Eastern Celestial Hemisphere

Definition
Consider the celestial sphere $C$ with observer $O$.

Let $E$ be the east point of the horizon.

The eastern celestial hemisphere is the hemisphere of $C$ defined by the principal vertical circle which contains $E$.


 * Celestial-Sphere.png

Also see

 * Definition:Western Celestial Hemisphere


 * Definition:Northern Celestial Hemisphere
 * Definition:Southern Celestial Hemisphere