nadir
Sign in to savethumb|300px|right|Diagram showing the relationship between the zenith, the nadir, and different types of [[horizon. Note that the zenith is opposite the nadir.]]
AI overview
The nadir is the point in the sky directly below you, opposite to the zenith (which is directly above). It matters because it helps astronomers and navigators describe positions in the sky using a consistent reference system.
AI-generated from the Wikipedia summary — may contain errors.
Article
7 sectionsContents
- Etymology
- Definitions
- Space science
- Medicine
- Figurative usage
- Notes
- References
thumb|300px|right|Diagram showing the relationship between the zenith, the nadir, and different types of [[horizon. Note that the zenith is opposite the nadir.]]
The nadir is the direction pointing directly below a particular location; that is, it is one of two vertical directions at a specified location, orthogonal to a horizontal flat surface.