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Nadir also refers to the downward-facing viewing geometry of an orbiting satellite, [2] such as is employed during remote sensing of the atmosphere, as well as when an astronaut faces the Earth while performing a spacewalk. A nadir image is a satellite image or aerial photo of the Earth taken vertically.
Diagram showing the relationship between the zenith, the nadir, and different types of horizon. The zenith (UK: / ˈ z ɛ n ɪ θ /, US: / ˈ z iː n ɪ θ /) [1] [2] is the imaginary point on the celestial sphere directly "above" a particular location. "Above" means in the vertical direction opposite to the gravity direction at that location ...
After Nadir Shah took the original, another throne was made for the Mughal emperor. Along with the Peacock Throne, Nadir had also taken the fabulous Koh-i Noor and Darya-i Noor diamonds to Persia, where some became part of the Persian crown jewels, and others were sold to the Ottomans. The plunder taken by Nadir was so great that he stopped ...
The nadir is a low or downward point of reference. Nadir may also refer to: Nadir (name), a surname and given name; Nadir (topography), a point of lowest local elevation; Nadir (astronomy), the point directly underneath a celestial observer; Nadir (web portal), a German web portal; Nadir, U.S. Virgin Islands, a settlement
In topography, a nadir is a point on a surface that is lower in elevation than all points immediately adjacent to it. [1] Mathematically , a nadir is a local minimum of elevation. A nadir may be the lowest point of a dry basin or depression , or the deepest point of a body of water or ice .
Horizontal coordinates use a celestial sphere centered on the observer. Azimuth is measured eastward from the north point (sometimes from the south point) of the horizon; altitude is the angle above the horizon.
Taking this one stage further, the clue word can hint at the word or words to be abbreviated rather than giving the word itself. For example: "About" for C or CA (for "circa"), or RE. "Say" for EG, used to mean "for example". More obscure clue words of this variety include: "Model" for T, referring to the Model T.
Nadir crater is a buried impact crater on the Guinea Plateau in the Atlantic Ocean, 400 kilometres (248 miles) off the coast of Guinea. The feature is named after the Nadir Seamount , located 100 km to the south.