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Judah Ha-Levi (crater)
Judah Ha-Levi is a crater on Mercury. Its name was adopted by the International Astronomical Union (IAU) in 1976. Judah Ha-Levi is named for the Spanish-Jewish poet and philosopher Judah Ha-Levi, who lived from 1075 to 1141. Hollows are present within Judah Ha-Levi. To the southeast of Judah Ha-Levi is the peak ring A peak ring crater is a type of complex crater, which is different from a multi-ringed basin or central-peak crater. A central peak is not seen; instead, a roughly circular ring or plateau, possibly discontinuous, surrounds the crater's center, ... crater Wang Meng. To the northwest is Glinka, and to the northeast is Chiang Kʽui. Judah Ha-Levi crater EN1021645181M.jpg, Interior of Judah Ha-Levi Judah Ha-Levi crater floor MESSENGER NAC mosaic.jpg, Detail of interior showing two patches of hollows right of center Wang Meng Judah Ha-Levi Glinka craters EN0108821478M.jpg, Regional view from MESSENGER's first flyby in January 2008, showing Wang Meng below ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MESSENGER
''MESSENGER'' was a NASA robotic space probe that orbited the planet Mercury between 2011 and 2015, studying Mercury's chemical composition, geology, and magnetic field. The name is a backronym for "Mercury Surface, Space Environment, Geochemistry, and Ranging", and a reference to the messenger god Mercury from Roman mythology. ''MESSENGER'' was launched aboard a Delta II rocket in August 2004. Its path involved a complex series of flybys – the spacecraft flew by Earth once, Venus twice, and Mercury itself three times, allowing it to decelerate relative to Mercury using minimal fuel. During its first flyby of Mercury in January 2008, ''MESSENGER'' became the second mission, after Mariner 10 in 1975, to reach Mercury. ''MESSENGER'' entered orbit around Mercury on March 18, 2011, becoming the first spacecraft to do so. It successfully completed its primary mission in 2012. Following two mission extensions, the spacecraft used the last of its maneuvering propellant to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Judah Halevi
Judah Halevi (also Yehuda Halevi or ha-Levi; he, יהודה הלוי and Judah ben Shmuel Halevi ; ar, يهوذا اللاوي ''Yahuḏa al-Lāwī''; 1075 – 1141) was a Spanish Jewish physician, poet and philosopher. He was born in Spain, either in Toledo or Tudela, in 1075 or 1086, and died shortly after arriving in the Holy Land in 1141, at that point the Crusader Kingdom of Jerusalem. Halevi is considered one of the greatest Hebrew poets, celebrated both for his religious and secular poems, many of which appear in present-day liturgy. His greatest philosophical work was the '' Sefer ha-Kuzari''. Biography Convention suggests that Judah ben Shmuel Halevi was born in Toledo, Spain in 1075. He often described himself as coming from Christian territory. Alfonso the Battler conquered Tudela in 1119; Toledo was conquered by Alfonso VI from the Muslims in Halevi's childhood (1086). As a youth, he seems to have gone to Granada, the main centre of Jewish literary and int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mercury (planet)
Mercury is the smallest planet in the Solar System and the closest to the Sun. Its orbit around the Sun takes 87.97 Earth days, the shortest of all the Sun's planets. It is named after the Roman god ' ( Mercury), god of commerce, messenger of the gods, and mediator between gods and mortals, corresponding to the Greek god Hermes (). Like Venus, Mercury orbits the Sun within Earth's orbit as an inferior planet, and its apparent distance from the Sun as viewed from Earth never exceeds 28°. This proximity to the Sun means the planet can only be seen near the western horizon after sunset or the eastern horizon before sunrise, usually in twilight. At this time, it may appear as a bright star-like object, but is more difficult to observe than Venus. From Earth, the planet telescopically displays the complete range of phases, similar to Venus and the Moon, which recurs over its synodic period of approximately 116 days. The synodic proximity of Mercury to Earth makes Mercury ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Institute Of Physics Publishing
IOP Publishing (previously Institute of Physics Publishing) is the publishing company of the Institute of Physics. It provides publications through which scientific research is distributed worldwide, including journals, community websites, magazines, conference proceedings and books. The Institute of Physics is a scientific charity devoted to increasing the practice, understanding and application of physics. Any financial surplus earned by IOP Publishing goes to support physics through the activities of the Institute. The main IOP Publishing headquarters is located in Bristol, England, and the North American headquarters is in Philadelphia, United States. It also has regional offices in, Mexico City, Beijing, Tokyo, Moscow, St. Petersburg, and Sydney. It employs over 400 staff. It was the first physics publisher to publish a journal on the internet. In 1994, the journal ''Classical and Quantum Gravity'' was published as a TeX file. In January 1996 the organization launched th ... [...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] |
Judah Ha-Levi
Judah Halevi (also Yehuda Halevi or ha-Levi; he, יהודה הלוי and Judah ben Shmuel Halevi ; ar, يهوذا اللاوي ''Yahuḏa al-Lāwī''; 1075 – 1141) was a Spanish Jewish physician, poet and philosopher. He was born in Spain, either in Toledo or Tudela, in 1075 or 1086, and died shortly after arriving in the Holy Land in 1141, at that point the Crusader Kingdom of Jerusalem. Halevi is considered one of the greatest Hebrew poets, celebrated both for his religious and secular poems, many of which appear in present-day liturgy. His greatest philosophical work was the '' Sefer ha-Kuzari''. Biography Convention suggests that Judah ben Shmuel Halevi was born in Toledo, Spain in 1075. He often described himself as coming from Christian territory. Alfonso the Battler conquered Tudela in 1119; Toledo was conquered by Alfonso VI from the Muslims in Halevi's childhood (1086). As a youth, he seems to have gone to Granada, the main centre of Jewish literary and intel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NASA
The National Aeronautics and Space Administration (NASA ) is an independent agency of the US federal government responsible for the civil space program, aeronautics research, and space research. NASA was established in 1958, succeeding the National Advisory Committee for Aeronautics (NACA), to give the U.S. space development effort a distinctly civilian orientation, emphasizing peaceful applications in space science. NASA has since led most American space exploration, including Project Mercury, Project Gemini, the 1968-1972 Apollo Moon landing missions, the Skylab space station, and the Space Shuttle. NASA supports the International Space Station and oversees the development of the Orion spacecraft and the Space Launch System for the crewed lunar Artemis program, Commercial Crew spacecraft, and the planned Lunar Gateway space station. The agency is also responsible for the Launch Services Program, which provides oversight of launch operations and countdown m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USGS
The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization's work spans the disciplines of biology, geography, geology, and hydrology. The USGS is a fact-finding research organization with no regulatory responsibility. The agency was founded on March 3, 1879. The USGS is a bureau of the United States Department of the Interior; it is that department's sole scientific agency. The USGS employs approximately 8,670 people and is headquartered in Reston, Virginia. The USGS also has major offices near Lakewood, Colorado, at the Denver Federal Center, and Menlo Park, California. The current motto of the USGS, in use since August 1997, is "science for a changing world". The agency's previous slogan, adopted on the occasion of its hundredth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hollows (Mercury)
Hollows are a landform on the planet Mercury, discovered during the ''MESSENGER'' mission that orbited the planet from 2011 to 2015. Hollows are typically clusters of rimless depressions with flat floors and haloes of bright (high albedo) material surrounding them. Hollows are thought to form by loss of volatiles from the surface by sublimation, caused by the intense solar radiation on the airless planet. They are some of the youngest features on Mercury. Hollows were first observed as bright areas within craters imaged by the Mariner 10 spacecraft in 1974, but the images were not of sufficient resolution to discern any detail. These craters include Balzac, Tyagaraja, Theophanes, Zeami, and Hopper.Dzurisin, D., 1977. Mercurian bright patches: Evidence for physio-chemical alteration of surface material? ''Geophysical Research Letters'', 4, 383-386, doi:10.1029/GL004i010p00383 The MESSENGER spacecraft imaged the rest of the planet, much of it at higher resolution and in col ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peak Ring
A peak ring crater is a type of complex crater, which is different from a multi-ringed basin or central-peak crater. A central peak is not seen; instead, a roughly circular ring or plateau, possibly discontinuous, surrounds the crater's center, with the crater rim still farther out from the center. Formation The rings form by different processes, and inner rings may not be formed by the same processes as outer rings.Geology Pagewww.geologypage.com/2016/10/research-helps-explain-formation-ringed-crater-moon.html accessdate: February 5, 2017 It has long been the view that peak rings are formed in the stage subsequent to central peak formation in craters. The central peaks of craters are believed to originate from hydrodynamic flow of material lifted by inward-collapsing crater walls, while impact-shattered rock debris is briefly turned to fluid by strong vibrations that develop during crater formation. The peak-ring structure of Chicxulub crater was probably formed as inward-co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wang Meng (crater)
Wang Meng is a crater on Mercury. Its name was adopted by the International Astronomical Union (IAU) in 1976. The crater is named for the Chinese painter Wang Meng. Wang Meng is one of 110 peak ring basins on Mercury. Hollows are present within Wang Men. A confirmed ''dark spot'' is present in along the northwestern peak ring.Zhiyong Xiao, Robert G. Strom, David T. Blewett, Paul K. Byrne, Sean C. Solomon, Scott L. Murchie, Ann L. Sprague, Deborah L. Domingue, Jörn Helbert, 2013. ''Dark spots on Mercury: A distinctive low-reflectance material and its relation to hollows''. Journal of Geophysical Research Planets.doi.org/10.1002/jgre.20115/ref> The crater Judah Ha-Levi is to the northwest of Wang Meng. To the south is Chu Ta, to the southeast is Rajnis, and to the north is Chiang Kʽui. Wang Meng crater hollows EN1021616788M.jpg, Hollows along northwest inner ring of Wang Meng Wang Meng Judah Ha-Levi Glinka craters EN0108821478M.jpg, Regional view from MESSENGER's firs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glinka (crater)
Glinka is a pit-floored crater on Mercury, which was discovered in 1974 by ''Mariner 10'' spacecraft. It was named by the IAU in 2008, after Russian composer Mikhail Glinka. Its floor is covered by the smooth plain material and displays a kidney-shaped collapse feature, which is also called a central pit. The size of the pit, which was first noticed in ''MESSENGER'' images obtained in January 2008, is . It is surrounded by a bright pyroclastic deposit. Such a feature may have resulted from collapse of a magma chamber underlying the central part of the crater. The collapse feature is an analog of Earth's volcanic caldera A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcano eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is ...s. File:Glinka crater EW1006407109G.jpg, Glinka crater File:Glinka crater EN0262402263M.map.jpg, Closeup of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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