Definition:Northern Celestial Hemisphere

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

Let $P$ be the north celestial pole.

The northern celestial hemisphere is the hemisphere of $C$ defined by the celestial equator which contains $P$.


 * Celestial-Sphere.png

Also see

 * Definition:Southern Celestial Hemisphere


 * Definition:Eastern Celestial Hemisphere
 * Definition:Western Celestial Hemisphere