Home > Term: zenith
zenith
The point in the sky directly above an observer. If the observer is at a pole, then the observer's zenith is a celestial pole; but for observers at midlatitudes the zenith is a point in the sky that corresponds to a changing right ascension but a constant declination as the sky rotates overhead. The point directly below the observer is the observer's nadir, and is 180° in longitude and in latitude from the observer's zenith.
- Μέρος του λόγου: noun
- Κλάδος/Τομέας: Επιστήμη
- Category: Γενική επιστήμη
- Company: McGraw-Hill
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- Francisb
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