Zenith

For other uses, see Zenith (disambiguation). "Zenith angle" redirects here. For the novel, see The Zenith Angle.
Diagram showing the relationship between the zenith, the nadir, and different types of horizon

The zenith (UK: /ˈzɛnɪθ/, US: /ˈziː-/) is the imaginary point on the celestial sphere directly "above" a particular location. "Above" means in the vertical direction (plumb line) opposite to the gravity direction at that location (nadir). The zenith is the "highest" point on the celestial sphere. The direction opposite of the zenith is the nadir.

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