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Airy-0 is a crater inside the larger Airy Crater on Mars, whose location historically defined the Martian prime meridian.It is about 0.5 km (0.3 mile) across and lies within the dark region Sinus Meridiani, one of the early albedo features to be identified on Mars.
On Earth, the zero elevation datum is based on sea level (the geoid). Since Mars has no oceans and hence no 'sea level', it is convenient to define an arbitrary zero-elevation level or "vertical datum" for mapping the surface, called areoid. [9] The datum for Mars was defined initially in terms of a constant atmospheric pressure.
Listed are the elevations of the peaks (the vertical position relative to the areoid, which is the Martian vertical datum — the surface defined as zero elevation by average martian atmospheric pressure and planet radius), which is not the height above the surrounding terrain (topographic prominence). Listed mons elevation is the highest point ...
In some situations sea level does not apply at all – for instance for mapping Mars' surface – forcing the use of a different "zero elevation", such as mean radius. A geodetic vertical datum takes some specific zero point, and computes elevations based on the geodetic model being used, without further reference to sea levels.
Coloring of the base map indicates relative elevations, based on data from the Mars Orbiter Laser Altimeter on NASA's Mars Global Surveyor. Whites and browns indicate the highest elevations ( +12 to +8 km ); followed by pinks and reds ( +8 to +3 km ); yellow is 0 km ; greens and blues are lower elevations (down to −8 km ).
The Lunae Palus quadrangle is one of a series of 30 quadrangle maps of Mars used by the United States Geological Survey (USGS) Astrogeology Research Program. The quadrangle is also referred to as MC-10 (Mars Chart-10). [1] Lunae Planum and parts of Xanthe Terra and Chryse Planitia are found in the Lunae Palus quadrangle. The Lunae Palus ...
The following is a list of regions on Mars given the name Terra (pl. Terrae). Most cover large, rugged areas, often including outflow channels, cratering, and "chaos terrain". They may be contrasted with the Planitia (e.g., Amazonis Planitia) and Mare (e.g., Mare Erythraeum), smoother regions of differing albedo.
The Mare Boreum quadrangle is one of a series of 30 quadrangle maps of Mars used by the United States Geological Survey (USGS) Astrogeology Research Program. The Mare Boreum quadrangle is also referred to as MC-1 (Mars Chart-1). [1] Its name derives from an older name for a feature that is now called Planum Boreum, a large plain surrounding the ...