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Harmakhis Vallis
Harmakhis Vallis is a valley near Hellas Planitia, Mars. It has been identified as an outflow channel, the site of catastrophic floods of water during Mars' past. Gullies are also common on the wall of Harmakhis Vallis, as seen the image below. Some authors have suggested these structures indicate geologically recent flow of small quantities of water across the surface.Heldmann, J. and M. Mellon. Observations of Martian gullies and constraints on potential formation mechanisms. 2004. Icarus. 168: 285-304. See also *Dao Vallis *Reull Vallis Reull Vallis is a valley on Mars that appears to have been carved by water. It runs westward into Hellas Planitia. It is named after the Gaelic word for planet. It is found in the Hellas quadrangle. Lineated Floor Deposits On the floors of som ... References ;Further reading * * External linksHiRISE image of Harmakhis Vallis wall Valleys and canyons on Mars Hellas quadrangle {{mars-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dao Niger And Harmakhis Vallis PIA02810
Dao, Dão or DAO may refer to: * Tao (Chinese: "The Way" 道), a philosophical concept * Dao (Chinese sword) (刀), a type of Chinese sword * Dao (Naga sword), a weapon and a tool of Naga people People and language * Yao people, a minority ethnic group of Vietnam * Dao language (Papuan), Indonesia * Dao language (China) * Dao (surname) (Đào), a Vietnamese surname * Dao (''Dungeons & Dragons''), a type of genie in the game ''Dungeons & Dragons'' * Dão (footballer) (born 1984), Brazilian football defender Places * Dao (country subdivision) (Dào), historical political divisions in China translated as "circuits" * Dao (state), a historical state during the Zhou dynasty * Dao, Capiz, Philippines * Dao County, in Yongzhou, Hunan, China * Dão DOC, a wine region in Portugal * Dão River, a river in Portugal Science and technology Biology * D-amino acid oxidase, a peroxisomal enzyme * Diamine oxidase, an enzyme also known as histaminase involved in the metabolism of histamine * D-a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hellas Planitia
Hellas Planitia is a plain located within the huge, roughly circular impact basin Hellas located in the southern hemisphere of the planet Mars. Hellas is the third- or fourth-largest known impact crater in the Solar System. The basin floor is about deep, deeper than the Moon's South Pole-Aitken basin, and extends about east to west.The part below zero datum, see Geography of Mars#Zero elevation It is centered at Hellas Planitia spans the boundary between the Hellas quadrangle and the Noachis quadrangle. Description With a diameter of about , it is the largest unambiguous impact structure on the planet; the obscured Utopia Planitia is slightly larger (the Borealis Basin, if it proves to be an impact crater, is considerably larger). Hellas Planitia is thought to have been formed during the Late Heavy Bombardment period of the Solar System, approximately 4.1 to 3.8 billion years ago, when a protoplanet or large asteroid hit the surface. The altitude difference between the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mars
Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System, only being larger than Mercury (planet), Mercury. In the English language, Mars is named for the Mars (mythology), 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 (moon), Phobos and Deimos (moon), Deimos. Some of the most notable surface features on Mars include Olympus Mons, the largest volcano and List of tallest mountains in the Solar System, highest known mountain in the Solar System and Valles Marineris, one of the largest canyons in the Solar System. The North Polar Basin (Mars), Borealis basin in the Northern Hemisphere covers approximately 40% of the planet and may be a la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Outflow Channel
Outflow channels are extremely long, wide swathes of scoured ground on Mars. They extend many hundreds of kilometers in length and are typically greater than one kilometer in width. They are thought to have been carved by huge outburst floods. Crater counts indicate that most of the channels were cut since the early Hesperian, though the age of the features is variable between different regions of Mars. Some outflow channels in the Amazonis and Elysium Planitiae regions have yielded ages of only tens of million years, extremely young by the standards of Martian topographic features. The largest, Kasei Vallis, is around long, greater than wide and exceeds in depth cut into the surrounding plains. The outflow channels contrast with the Martian channel features known as " valley networks", which much more closely resemble the dendritic planform more typical of terrestrial river drainage basins. Outflow channels tend to be named after the names for Mars in various ancient world ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Martian Gullies
Martian gullies are small, incised networks of narrow channels and their associated downslope sediment deposits, found on the planet of Mars. They are named for their resemblance to terrestrial gullies. First discovered on images from Mars Global Surveyor, they occur on steep slopes, especially on the walls of craters. Usually, each gully has a dendritic ''alcove'' at its head, a fan-shaped ''apron'' at its base, and a single thread of incised ''channel'' linking the two, giving the whole gully an hourglass shape. They are estimated to be relatively young because they have few, if any craters. A subclass of gullies is also found cut into the faces of sand dunes, that are themselves considered to be quite young. Linear dune gullies are now considered recurrent seasonal features. Most gullies occur 30 degrees poleward in each hemisphere, with greater numbers in the southern hemisphere. Some studies have found that gullies occur on slopes that face all directions; others have found t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dao Vallis
Dao Vallis is a valley on Mars that appears to have been carved by water. It runs southwestward into Hellas Planitia from the southern slopes of the volcano Hadriacus Mons, and has been identified as an outflow channel. It and its tributary, Niger Vallis, extend for about . It is named after the Thai word for star, and it was proposed as a potential landing site for the 2012 Curiosity rover of the Mars Science Laboratory mission. In the fictional 2007 Canadian miniseries ''Race to Mars'', it is the landing site for ''Gagarin'', the lander. Origin Dao Vallis begins near a large volcano, Hadriacus Mons, so it is thought to have received water when hot magma melted huge amounts of ice in the frozen ground. Much of this water may have been released in very large "outburst floods". The partially circular depressions on the left side of the channel in the image below suggests that groundwater sapping also contributed water more gradually. Image:Dao Vallis.JPG, Section of Dao Vallis, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reull Vallis
Reull Vallis is a valley on Mars that appears to have been carved by water. It runs westward into Hellas Planitia. It is named after the Gaelic word for planet. It is found in the Hellas quadrangle. Lineated Floor Deposits On the floors of some channels are features called lineated floor deposits. They are ridged and grooved materials that seem to deflect around obstacles. They are believed to be ice-rich. Some glaciers on the Earth show such features. Lineated floor deposits may be related to lobate debris aprons, which have been proven to contain large amounts of ice. Reull Vallis, as pictured below, displays these deposits.http://themis.asu.edu.zoom-20070716a Gallery Image:Reull Vallis.JPG, Drainage features in Reull Vallis, as seen by THEMIS. Click on image to see relationship of Reull Vallis to other features. File:Reull Vallis lineated deposits.jpg, Reull Vallis with lineated floor deposits, as seen by THEMIS. Click on image to see relationship to other feature ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lunar And Planetary Science Conference
The Lunar and Planetary Science Conference (LPSC), jointly sponsored by the Lunar and Planetary Institute (LPI) and NASA Johnson Space Center (JSC), brings together international specialists in petrology, geochemistry, geophysics, geology, and astronomy to present the latest results of research in planetary science. Since its beginning in 1970, the LPSC has been a significant focal point for planetary science research, with more than 2000 planetary scientists and students attending from all over the world. History In a speech delivered at the Manned Spacecraft Center (MSC) in Houston, Texas in March 1968, President Lyndon B. Johnson announced the formation of the Lunar Science Institute (LSI). The creation of the LSI was the culmination of meetings and events involving the National Aeronautics and Space Administration, the National Academy of Sciences, Universities Research Association, and several major universities. Initially operated by the National Academy of Sciences, the Uni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valleys And Canyons On Mars
A valley is an elongated low area often running between hills or mountains, which will typically contain a river or stream running from one end to the other. Most valleys are formed by erosion of the land surface by rivers or streams over a very long period. Some valleys are formed through erosion by glacial ice. These glaciers may remain present in valleys in high mountains or polar areas. At lower latitudes and altitudes, these glacially formed valleys may have been created or enlarged during ice ages but now are ice-free and occupied by streams or rivers. In desert areas, valleys may be entirely dry or carry a watercourse only rarely. In areas of limestone bedrock, dry valleys may also result from drainage now taking place underground rather than at the surface. Rift valleys arise principally from earth movements, rather than erosion. Many different types of valleys are described by geographers, using terms that may be global in use or else applied only locally. For ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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