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Kamil Crater
The Kamil Crater is a and (original depth, a part covered by sand at present) meteorite impact crater in the East Uweinat Desert in southwestern New Valley Governorate, Egypt, only north of the border with the Sudan and above sea level. It was located in 2008 using Google Earth satellite imagery by Vincenzo de Michele (former curator of the Museo Civico di Storia Naturale di Milan in Milan, Italy). It is one of the few craters on Earth with a well-preserved ray system. Studies The first geophysical study of the Kamil Crater was conducted during an Italian-Egyptian expedition undertaken in February 2010 as part of the 2009 Egyptian-Italian Science Year (EISY) and proved the meteoritic origin of the crater. It is estimated to be less than 5,000 years old and shows a well-preserved rayed structure. The crater was produced by an iron meteorite that has been given an official name after the closest topographic feature in the area, Gebel Kamil, and which fragmented into thous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Egypt
Egypt ( , ), officially the Arab Republic of Egypt, is a country spanning the Northeast Africa, northeast corner of Africa and Western Asia, southwest corner of Asia via the Sinai Peninsula. It is bordered by the Mediterranean Sea to northern coast of Egypt, the north, the Gaza Strip of Palestine and Israel to Egypt–Israel barrier, the northeast, the Red Sea to the east, Sudan to Egypt–Sudan border, the south, and Libya to Egypt–Libya border, the west; the Gulf of Aqaba in the northeast separates Egypt from Jordan and Saudi Arabia. Cairo is the capital, list of cities and towns in Egypt, largest city, and leading cultural center, while Alexandria is the second-largest city and an important hub of industry and tourism. With over 109 million inhabitants, Egypt is the List of African countries by population, third-most populous country in Africa and List of countries and dependencies by population, 15th-most populated in the world. Egypt has one of the longest histories o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ray System
In planetary geology, a ray system comprises radial streaks of fine '' ejecta'' thrown out during the formation of an impact crater, looking somewhat like many thin spokes coming from the hub of a wheel. The rays may extend for lengths up to several times the diameter of their originating crater, and are often accompanied by small secondary craters formed by larger chunks of ejecta. Ray systems have been identified on the Moon, Earth ( Kamil Crater), Mercury, and some moons of the outer planets. Originally it was thought that they existed only on planets or moons lacking an atmosphere, but more recently they have been identified on Mars in infrared images taken from orbit by '' 2001 Mars Odyssey''s thermal imager. Rays appear at visible, and in some cases infrared wavelengths, when ejecta are made of material with different reflectivity (i.e., albedo) or thermal properties from the surface on which they are deposited. Typically, visible rays have a higher albedo than th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Pisa
The University of Pisa (, UniPi) is a public university, public research university in Pisa, Italy. Founded in 1343, it is one of the oldest universities in Europe. Together with Scuola Normale Superiore di Pisa and Sant'Anna School of Advanced Studies, it is part of the Pisa University System. History The Origins The University of Pisa was officially founded in 1343, although various scholars place its origins in the 11th century. It is certain, however, that from the middle of the 12th century Pisa had a “Universitas” in the original sense of the word, that is, a group of students who gathered around masters. It was during this period that Leonardo Fibonacci was born and worked. He was one of the greatest mathematicians in history who, through his work, synthesized the spirit and processes of Greek geometry and the tools of Arabic mathematics for the first time in Europe. The papal seal “In Supremae dignitatis”, issued by Pope Clement VI on 3 September 1343, grant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Siena
The University of Siena (, abbreviation: UNISI), located in Siena, Tuscany, holds the distinction of being Italy's first publicly funded university as well as one of the oldest, originally established as ''Studium Senese'' in 1240. As of 2022, it hosts approximately 16,000 students—nearly one-third of Siena's total population of about 53,000. The university is renowned for its schools of law, medicine, and economics and management. History The early ''studium'' The School of Humanities and Philosophy On December 26, 1240, Ildebrandino Cacciaconti, the then podestà of Siena, signed a decree imposing a tax on citizens of Siena who rented rooms to students of the local "''Studium Senese''". The money from this tax went towards paying for the salaries of the ''maestri'' (teachers) of this new studium. The studium was further supported when, in 1252, Pope Innocent IV declared both its teachers and students completely immune from taxes and forced labour levied on their person ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cairo
Cairo ( ; , ) is the Capital city, capital and largest city of Egypt and the Cairo Governorate, being home to more than 10 million people. It is also part of the List of urban agglomerations in Africa, largest urban agglomeration in Africa, List of largest cities in the Arab world, the Arab world, and List of largest metropolitan areas of the Middle East, the Middle East. The Greater Cairo metropolitan area is List of largest cities, one of the largest in the world by population with over 22.1 million people. The area that would become Cairo was part of ancient Egypt, as the Giza pyramid complex and the ancient cities of Memphis, Egypt, Memphis and Heliopolis (ancient Egypt), Heliopolis are near-by. Located near the Nile Delta, the predecessor settlement was Fustat following the Muslim conquest of Egypt in 641 next to an existing ancient Roman empire, Roman fortress, Babylon Fortress, Babylon. Subsequently, Cairo was founded by the Fatimid Caliphate, Fatimid dynasty in 969. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Egyptian Geological Museum
The Egyptian Geological Museum is a museum in Cairo, Egypt. The museum was established in 1901 as part of the Egyptian Geological Survey, which had been started in 1896 under the direction of the Isma'il Pasha, Khedive Ismail. The museum was the first of its kind in the Middle East and the African continent.Kamil, Jill"History in geological time", ''Al-Ahram Weekly'', October 7, 2004. Accessed October 3, 2008. Museum history The museum was initially housed in a Greco-Roman style building that was located in the gardens of the Ministry of Public Works in downtown Cairo; it was designed by Marcel Dourgnon, the French architect who had previously designed and constructed the Egyptian Museum (also known as the Museum of Egyptian Antiquities). This building had an exhibition hall with ceilings high in order to accommodate the reconstructed fossil skeletons of paleontological finds, which included a ancestral elephant. The first Museum Keeper was William Andrews, a paleontologist from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandstone
Sandstone is a Clastic rock#Sedimentary clastic rocks, clastic sedimentary rock composed mainly of grain size, sand-sized (0.0625 to 2 mm) silicate mineral, silicate grains, Cementation (geology), cemented together by another mineral. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar, because they are the most resistant minerals to the weathering processes at the Earth's surface. Like uncemented sand, sandstone may be imparted any color by impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Because sandstone beds can form highly visible cliffs and other topography, topographic features, certain colors of sandstone have become strongly identified with certain regions, such as the red rock deserts of Arches National Park and other areas of the Southwestern United States, American Southwest. Rock formations composed of sandstone usually allow the p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meteoritical Society
The Meteoritical Society is a non-profit scholarly organization founded in 1933 to promote research and education in planetary science with emphasis on studies of meteorites and other extraterrestrial materials that further our understanding of the origin and history of the Solar System. Members The membership of the society comprises over 1,000 scientists and amateur enthusiasts from over 52 countries who are interested in a wide range of planetary science topics. Members interests include meteorites, cosmic dust, asteroids and comets, natural satellites, planets, impact events, and the origins of the Solar System. Activities The Meteoritical Society is the organization that records all known meteorites in its '' Meteoritical Bulletin''. The Society also publishes one of the world's leading planetary science journals, '' Meteoritics & Planetary Science'', and is a cosponsor with the Geochemical Society of the renowned journal '' Geochimica et Cosmochimica Acta''. The Society pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gebel Kamil (meteorite)
Gebel Kamil is a meteorite that struck Egypt later than 3000 BC, leaving a crater surrounded by thousands of pieces of iron shrapnel with a total weight of about . History In February 2009 and 2010, meteorite fragments with masses ranging from < to , plus an specimen, were found in and around a radius from by an Italian-Egyptian geophysical team. About was recovered. The geophysical survey took place as part of the "2009 Italian-Egyptian Year of Science and Technology". Mineralogy '' ''
The Gebel Kamil meteorite contains the minerals
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Iron Meteorite
Iron meteorites, also called siderites or ferrous meteorites, are a type of meteorite that consist overwhelmingly of an iron–nickel alloy known as meteoric iron that usually consists of two mineral phases: kamacite and taenite. Most iron meteorites originate from cores of planetesimals, with the exception of the IIE iron meteorite group. The iron found in iron meteorites was one of the earliest sources of usable iron available to humans, due to the malleability and ductility of the meteoric iron, before the development of smelting that signaled the beginning of the Iron Age. Occurrence Although they are fairly rare compared to the stony meteorites, comprising only about 5.7% of witnessed falls, iron meteorites have historically been heavily over-represented in meteorite collections. This is due to several factors: * They are easily recognized as unusual, as opposed to stony meteorites. Modern-day searches for meteorites in deserts and Antarctica yield a much more repre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ray System
In planetary geology, a ray system comprises radial streaks of fine '' ejecta'' thrown out during the formation of an impact crater, looking somewhat like many thin spokes coming from the hub of a wheel. The rays may extend for lengths up to several times the diameter of their originating crater, and are often accompanied by small secondary craters formed by larger chunks of ejecta. Ray systems have been identified on the Moon, Earth ( Kamil Crater), Mercury, and some moons of the outer planets. Originally it was thought that they existed only on planets or moons lacking an atmosphere, but more recently they have been identified on Mars in infrared images taken from orbit by '' 2001 Mars Odyssey''s thermal imager. Rays appear at visible, and in some cases infrared wavelengths, when ejecta are made of material with different reflectivity (i.e., albedo) or thermal properties from the surface on which they are deposited. Typically, visible rays have a higher albedo than th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discovery Channel
Discovery Channel, known as The Discovery Channel from 1985 to 1995, and often referred to as simply Discovery, is an American cable channel that is best known for its ongoing reality television shows and promotion of pseudoscience. It initially provided documentary television programming focused primarily on popular science, technology, and history, but by the 2010s had become increasingly dominated by programs that were reality television shows, promoted conspiracy theories, or advocated junk science. It is owned by Warner Bros. Discovery, a publicly traded company run by CEO David Zaslav. , Discovery Channel was the third most widely distributed subscription channel in the United States, behind now-sibling channel TBS and the Weather Channel; it is available in 409 million households worldwide, through its U.S. flagship channel and its various owned or licensed television channels internationally. , Discovery Channel is available to approximately 71,000,000 pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
