Zenith

:For other uses, see Zenith (disambiguation).

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

The zenith is the point in the sky which appears directly above the observer. More precisely, it is the point on the sky with an altitude of +90 degrees, and it is the pole of the horizontal coordinate system. Geometrically, it is the point on the celestial sphere intersected by a line drawn from the center of the Earth through your location on the Earth's surface. The point opposite the zenith is the nadir.

Related Topics:
Altitude - Horizontal coordinate system - Celestial sphere - Nadir

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

The zenith is, by definition, a point along the local meridian.

~ ~ ~ ~ ~ ~ ~ ~ ~ ~