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- Dictionaryzenith/ˈzɛnɪθ/
noun
- 1. the time at which something is most powerful or successful: "in 1977, punk was at its zenith"
- 2. the point in the sky or celestial sphere directly above an observer.
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noun
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The zenith is an imaginary point directly "above" a particular location, on the celestial sphere. "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. Wikipedia