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Geber (crater)
Geber is a lunar impact crater that is located in the rugged south-central highlands of the Moon. It lies halfway between the crater Almanon to the north-northeast and the crater pair of Azophi and Abenezra to the south-southwest. Farther to the southeast is Sacrobosco. Geber is 45 kilometers in diameter and 3,510 meters deep.''Autostar Suite Astronomer Edition''. CD-ROM. Meade, April 2006. The rim of Geber is symmetrical and nearly circular, with only minor indentations at the north and south faces of its high, terraced wall A terraced wall, also a terrace wall, or a terraced retaining wall is a wall that is divided into sections ( terraces) over a slope. Such designs are useful when building on a steep grade. Terraced walls may be built with many different materia .... The floor is flat and lacks a significant central peak at the midpoint. The small satellite crater Geber B is attached to the northwest rim. Geber is from the Nectarian period. In 1935, the crater was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lunar Reconnaissance Orbiter
The Lunar Reconnaissance Orbiter (LRO) is a NASA robotic spacecraft currently orbiting the Moon in an eccentric polar mapping orbit. Data collected by LRO have been described as essential for planning NASA's future human and robotic missions to the Moon. Its detailed mapping program is identifying safe landing sites, locating potential resources on the Moon, characterizing the radiation environment, and demonstrating new technologies. Launched on June 18, 2009, in conjunction with the Lunar Crater Observation and Sensing Satellite (LCROSS), as the vanguard of NASA's Lunar Precursor Robotic Program, LRO was the first United States mission to the Moon in over ten years. LRO and LCROSS were launched as part of the United States's Vision for Space Exploration program. The probe has made a 3-D map of the Moon's surface at 100-meter resolution and 98.2% coverage (excluding polar areas in deep shadow), including 0.5-meter resolution images of Apollo landing sites. The first images ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sacrobosco (crater)
Sacrobosco is an irregular lunar impact crater that is located in the rugged southern highlands to the west of the Rupes Altai escarpment. It is a readily identified feature due to the three circular craters that lie on its floor. The rim of Sacrobosco is heavily worn and eroded, especially in the northeast. The floor is relatively flat in the south, except where overlain by Sacrobosco A and B, but is somewhat irregular in the northeast. To the northwest of Sacrobosco is the double crater Abenezra and Azophi. To the east-northeast is Fermat Pierre de Fermat (; between 31 October and 6 December 1607 – 12 January 1665) was a French mathematician who is given credit for early developments that led to infinitesimal calculus, including his technique of adequality. In particular, he is ..., and to the south-southwest lies Pontanus. Satellite craters By convention these features are identified on Lunar maps by placing the letter on the side of the crater midpoint that is closes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambridge University Press
Cambridge University Press is the university press of the University of Cambridge. Granted letters patent by King Henry VIII in 1534, it is the oldest university press in the world. It is also the King's Printer. Cambridge University Press is a department of the University of Cambridge and is both an academic and educational publisher. It became part of Cambridge University Press & Assessment, following a merger with Cambridge Assessment in 2021. With a global sales presence, publishing hubs, and offices in more than 40 countries, it publishes over 50,000 titles by authors from over 100 countries. Its publishing includes more than 380 academic journals, monographs, reference works, school and university textbooks, and English language teaching and learning publications. It also publishes Bibles, runs a bookshop in Cambridge, sells through Amazon, and has a conference venues business in Cambridge at the Pitt Building and the Sir Geoffrey Cass Sports and Social Centre. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Astronomical Union
The International Astronomical Union (IAU; french: link=yes, Union astronomique internationale, UAI) is a nongovernmental organisation with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and development through global cooperation. It was founded in 1919 and is based in Paris, France. The IAU is composed of individual members, who include both professional astronomers and junior scientists, and national members, such as professional associations, national societies, or academic institutions. Individual members are organised into divisions, committees, and working groups centered on particular subdisciplines, subjects, or initiatives. As of 2018, the Union had over 13,700 individual members, spanning 90 countries, and 82 national members. Among the key activities of the IAU is serving as a forum for scientific conferences. It sponsors nine annual symposia and holds a triannual General Assembly that sets policy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Donald Wilhelms
Don Edward Wilhelms (born July 5, 1930) is a former United States Geological Survey geologist who contributed to geologic mapping of the Earth's moon and to the geologic training of the Apollo astronauts. He is the author of '' To a Rocky Moon: A Geologist's History of Lunar Exploration'' (1993), ''The geologic history of the Moon'' (1987), and he co-authored the ''Geologic Map of the Near Side of the Moon'' (1971) with John F. McCauley. Wilhelms also contributed to ''Apollo Over the Moon: A View from Orbit'' (NASA SP-362). He has also contributed to the study of Mars (including Mariner 9), Mercury, and Ganymede. Biography He was born July 5, 1930. Wilhelms was the recipient of the G. K. Gilbert Award in 1988. He received the Shoemaker Distinguished Lunar Scientist Award in 2010 at the Ames Research Center The Ames Research Center (ARC), also known as NASA Ames, is a major NASA research center at Moffett Federal Airfield in California's Silicon Valley. It was founded in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nectarian
The Nectarian Period of the lunar geologic timescale runs from 3920 million years ago to 3850 million years ago. It is the period during which the Nectaris Basin and other major basins were formed by large impact events. Ejecta from Nectaris form the upper part of the densely cratered terrain found in lunar highlands. Relationship to Earth's geologic time scale Since little or no geological evidence on Earth Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large volumes of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's sur ... exists from the time spanned by the Nectarian period of the Moon, the Nectarian has been used by at least one notable scientific work as an unofficial subdivision of the terrestrial Hadean eon. See also * References {{Geological history, c *03 Lunar geologic periods ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kalmbach Books
Kalmbach Media (formerly Kalmbach Publishing Co.) is an American publisher of books and magazines, many of them railroad-related, located in Waukesha, Wisconsin. History The company's first publication was ''The Model Railroader'', which began publication in the summer of 1933 with a cover date of January 1934. A press release announcing the magazine appeared in August 1933, but did not receive much interest. In 1940, business was good enough for Kalmbach to launch another magazine about railroads in general with the simple title of '' Trains Magazine''. From its first issue dated November 1940, it grew quickly from an initial circulation of just over 5,000. Kalmbach became exclusively a publisher when it discontinued its printing operations in 1973, opting to contract production from other printers. In 1985, Kalmbach purchased AstroMedia Corporation, adding its four magazines: ''Astronomy'', ''Deep Sky'', the children's science magazine ''Odyssey'' and ''Telescope Making' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terraced Wall
A terraced wall, also a terrace wall, or a terraced retaining wall is a wall that is divided into sections ( terraces) over a slope. Such designs are useful when building on a steep grade. Terraced walls may be built with many different materials. Some craters have terraced walls, which includes complex craters. Types of terraced walls A ''partially terraced wall'' is designed so that the upper terrace and lower terrace come back together, forming a taller wall. The wall may still work well, but may have aesthetic issues. There are two types. In an ''independent terraced wall'', the upper wall applies little or no weight load on the lower wall. In a ''dependent terraced wall'', the upper wall places a weight load on the lower wall. See also * Buttress * Buttress dam * Flying buttress * Load-bearing wall * Retaining wall * Terrace (building) * Terrace (earthworks) * Terrace garden In gardening, a terrace is an element where a raised flat paved or gravelled section over ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abenezra (crater)
Abenezra is a lunar impact crater located in the rugged highlands in the south-central section of the Moon. Abenezra is named after the Sephardic Jewish sage, poet, biblical commentator, astronomer, and astrologer Abraham ibn Ezra. It is attached along the southeast rim to the crater Azophi. To the northeast lies the crater Geber, and further to the southeast is the larger Sacrobosco. The rim of Abenezra has a noticeably polygonal shape, with uneven wall segments. The inner walls are terraced In agriculture, a terrace is a piece of sloped plane that has been cut into a series of successively receding flat surfaces or platforms, which resemble steps, for the purposes of more effective farming. This type of landscaping is therefore ..., and the floor is irregular and ridged. These ridges form unusual, sinuous patterns across the floor. The crater overlays the eastern part of another crater-like formation designated Abenezra C. Satellite craters By convention these featu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jabir Ibn Aflah
Abū Muḥammad Jābir ibn Aflaḥ ( ar, أبو محمد جابر بن أفلح, la, Geber/Gebir; 1100–1150) was an Arab Muslim astronomer and mathematician from Seville, who was active in 12th century al-Andalus. His work ''Iṣlāḥ al-Majisṭi'' (Correction of the ''Almagest'') influenced Islamic, Jewish, and Christian astronomers. ''Iṣlāḥ al-Majisṭi (Correction of the Almagest)'' This work is a commentary and reworking of Ptolemy's '' Almagest'' and is the first criticism of it in the Islamic West. He particularly criticized the mathematical basis of the work. For example, he replaced the use of Menelaus' theorem with ones based on spherical trigonometry, in what seems to be an attempt to increase the mathematical precision of the work. These theorems had been developed by a group of 10th century Islamic mathematicians who included Abū al-Wafā' Būzjānī and then also by Abu Abd Allah Muhammad ibn Muadh Al-Jayyani who worked in Andalusia during the 11th ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Azophi (crater)
Azophi is a lunar impact crater that lies in the rugged south-central highlands of the Moon. The crater is named after the 10th-century Persian astronomer Abd Al-Rahman Al Sufi, also known by his western name, Azophi. The northwest rim is attached to the slightly smaller crater Abenezra, to the east-southeast is the large and irregular Sacrobosco, and to the west-southwest is Playfair. The wide outer rim of Azophi has a somewhat polygon In geometry, a polygon () is a plane figure that is described by a finite number of straight line segments connected to form a closed '' polygonal chain'' (or ''polygonal circuit''). The bounded plane region, the bounding circuit, or the two ...al shape with rounded corners. The edge is relatively sharp and cleft-like. The rim is not significantly worn or impacted by smaller craters, with the exception of Azophi C, which lies on the inner northeast wall. The interior floor lacks a central peak and is only marked by a few small craterlet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Almanon (crater)
Almanon is a lunar impact crater that lies in the rugged highlands in the south-central region of the Moon. It was named after Abbasid Caliph and astronomer Al-Ma'mun. It is located to the south-southeast of Abulfeda, and to the north-northeast of the smaller crater Geber. The crater chain designated Catena Abulfeda forms a line between the south rim of Abulfeda and the north rim of Almanon, continuing for a length of about 210 kilometers to the Rupes Altai Rupes Altai is an escarpment in the lunar surface that is located in the southeastern quadrant of the Moon's near side. It is named for the Altai Mountains in Asia, and is the most prominent lunar escarpment. The selenographic coordinates of this ... scarp. The rim of Almanon forms a slightly distorted circle, with outward bulges to the north and southwest. The crater pair Almanon A and Almanon B is attached to the exterior of the southern rim. The interior wall is wider along the eastern side than elsewhere. Small crat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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