Rayleigh (Martian Crater)
Rayleigh is an impact crater in the Mare Australe quadrangle of Mars, located at 75.6°S latitude and 240.9°W longitude. It measures approximately 126 kilometers in diameter and was named after English physicist Lord Rayleigh. The name was approved by the International Astronomical Union (IAU) Working Group for Planetary System Nomenclature in 1973. The pictures show layered features. These features may have resulted from the erosion of layers of mantle. Wikirayleigh.jpg, Crater ''Rayleigh'', as seen by CTX camera (on Mars Reconnaissance Orbiter). Wikirayleighlayers.jpg, Layers in Rayleigh crater, as seen by CTX camera (on Mars Reconnaissance Orbiter). Note: this is an enlargement of the previous image of Rayleigh crater. See also * 22740 Rayleigh, asteroid * Climate of Mars * Geology of Mars * Impact event * List of craters on Mars * Ore resources on Mars * Planetary nomenclature * Water on Mars Almost all water on Mars today exists as ice, though it also exists in ...
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Mars
Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System, only being larger than Mercury. In the English language, Mars is named for the Roman god of war. Mars is a terrestrial planet with a thin atmosphere (less than 1% that of Earth's), and has a crust primarily composed of elements similar to Earth's crust, as well as a core made of iron and nickel. Mars has surface features such as impact craters, valleys, dunes and polar ice caps. It has two small and irregularly shaped moons, Phobos and Deimos. Some of the most notable surface features on Mars include Olympus Mons, the largest volcano and highest known mountain in the Solar System and Valles Marineris, one of the largest canyons in the Solar System. The Borealis basin in the Northern Hemisphere covers approximately 40% of the planet and may be a large impact feature. Days and seasons on Mars are comparable to those of Earth, as the planets have a similar rotation period a ...
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