Dictionary

Nadir

Nadir

Astronomical definition of Arabic origin that indicates the point of the celestial vault to the antipodes of the observer, or the point exactly opposite to the Zenith.

If we imagine suspending a lead wire at the observation site, the zenith is located in the upward extension of the wire until the imaginary celestial sphere is intercepted; The nadir is the downward extension of the same thread.


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Astronomy Glossary: ​​NPOT

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