Information AboutNadir |
| CATEGORIES ABOUT NADIR | |
| arabic words and phrases | |
| celestial coordinate system | |
| technical factors of astrology | |
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The nadir (from Arabic ''nazir'', "opposite") is the Astronomical term for the point in the sky directly below the observer, or more precisely, the point in the sky with an altitude of -90°. Geometrically, it is the point on the Celestial Sphere intersected by a line drawn from the observer's location on the Earth's surface through the center of the Earth. The point opposite the nadir is the Zenith . By association, nadir is also used to mean the lowest point, or time of greatest adversity. Nadir also refers to a downward-facing viewing angle of an orbiting Satellite , such as is employed during remote sensing of the Atmosphere . |
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