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Mitra (crater)
Mitra is a lunar impact crater that is attached to the western outer rim of the larger crater Mach, on the far side of the Moon. Just to the west of Mitra is Bredikhin, and to the south-southeast lies Henyey. It is named after Sisir Kumar Mitra, who was an Indian physicist and Padma Bhushan award recipient known for his pioneering work in the field of ionosphere and radiophysics. This is a heavily eroded formation with an outer rim that has been damaged by subsequent impacts. Attached to the exterior along the southeast is the satellite crater Mitra J. A number of smaller impacts lie along the rim edge, and very little of the original rim remains intact. Within the interior, a smaller crater occupies the southwestern part of the floor, and a small, cup-shaped crater lies across the northeast rim of this formation and very close to the midpoint of Mitra. The remaining floor is marked only by a few small and tiny craterlets. Mitra lies within the Dirichlet–Jackson Basin. Sate ... [...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 f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radiophysics
Radiophysics (also modern writing "radio physics") is a branch of physics focused on the theoretical and experimental study of certain kinds of radiation, its emission, propagation and interaction with matter. The term is used in the following major meanings: *study of radio waves (the original area of research) *study of radiation used in radiology in ''Medcyclopaedia'' (archived from the original), online version of the '''' *study of other ranges of the spectrum of |
Sterling Publishing Co
Sterling Publishing Company, Inc. is a publisher of a broad range of subject areas, with multiple imprints and more than 5,000 titles in print. Founded in 1949 by David A. Boehm, Sterling also publishes books for a number of brands, including AARP, Hasbro, Hearst Magazines, and ''USA TODAY'', as well as serves as the North American distributor for domestic and international publishers including: Anova, the Brooklyn Botanic Garden, Carlton Books, Duncan Baird, Guild of Master Craftsmen, the Orion Publishing Group, and Sixth & Spring Books. Sterling also owns and operates two verticals, Lark Crafts and Pixiq. Sterling Publishing is a wholly owned subsidiary of Barnes & Noble, which acquired it in 2003. On January 5, 2012, ''The Wall Street Journal'' reported that Barnes & Noble had put its Sterling Publishing business up for sale. Negotiations failed to produce a buyer, however, and Sterling is reportedly no longer for sale as of March, 2012. In January 2022, Sterling rebranded ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jonathan's Space Report
''Jonathan's Space Report'' (JSR) is a newsletter about the Space Age, hosted at Jonathan's Space Page. It is written by Jonathan McDowell, a Center for Astrophysics Harvard & Smithsonian astrophysicist. It is updated as McDowell's schedule permits, but he tries to publish two issues each month. Originally the website was hosted on a Harvard University account, but was moved in late 2003 to a dedicated domain. Started in 1989, the newsletter reports on recent space launches, International Space Station activities and space craft developments. McDowell's report occasionally corrects NASA's official web sites, or provides additional data on classified launches that aren't available elsewhere. Associated projects on the JSR web site are: * A catalog of all known geosynchronous satellites and their current positions * A listing of satellite launch attempts * A cross-reference between catalog number and international designation of artificial satellites McDowell has long campaigne ... [...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 Henry VIII of England, King Henry VIII in 1534, it is the oldest university press A university press is an academic publishing house specializing in monographs and scholarly journals. Most are nonprofit organizations and an integral component of a large research university. They publish work that has been reviewed by schola ... 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 Country, 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 uni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Geological Survey
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 hundredt ... [...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 management f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bose (crater)
Bose is a lunar impact crater that is located on the far side of the Moon, in the southern sphere hemisphere. It lies just to the northwest of the smaller crater Bhabha, and southeast of Alder. The outer rim of Bose has become worn and the edges rounded by impacts, although the shape of the wall is still well-preserved. The small satellite crater Bose D lies across the east-northeastern rim, and a smaller craterlet has impacted on the inner southeast wall. The inner floor is level with a low central peak offset slightly to the southeast of the midpoint. There are several tiny craterlets marking the interior, including three to the east of the central peak. The crater is named after an eminent Indian polymath, Sir Jagadish Chandra Bose, for his works on wireless communication. Satellite craters By convention these features are identified in selenography by placing the letter on the side of the crater midpoint that is closest to Bose. See also * Mitra (crater) Mitra is a lun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dirichlet–Jackson Basin
The Dirichlet–Jackson Basin is a pre-Nectarian impact basin on the far side of the Moon. It is named after the craters Dirichlet (on the southeast margin) and Jackson (northwest of the basin). It lies to the north of the similar-sized basin Korolev. The basin is not obvious on the lunar surface due to being obscured by subsequent impacts. It was confirmed by topographic mapping by the Clementine spacecraft in 2000. The existence of the basin was confirmed by the GRAIL spacecraft. Craters within the basin include Raimond, Bredikhin, Mitra, and Henyey (adjacent to Dirichlet), as well as many satellite craters. Due south of the basin is Engel'gardt (and the Selenean summit). To the southwest are Lebedinskiy and Zhukovskiy, and McMath is to the northwest. To the northeast is Mach, and to the southeast is Tsander. File:Dirichlet-Jackson basin topo.jpg, Topographic map File:Dirichlet-Jackson basin GRAIL gravity.jpg, Gravity map based on GRAIL External links KAGUYA Tak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ionosphere
The ionosphere () is the ionized part of the upper atmosphere of Earth, from about to above sea level, a region that includes the thermosphere and parts of the mesosphere and exosphere. The ionosphere is ionized by solar radiation. It plays an important role in atmospheric electricity and forms the inner edge of the magnetosphere. It has practical importance because, among other functions, it influences radio propagation to distant places on Earth. History of discovery As early as 1839, the German mathematician and physicist Carl Friedrich Gauss postulated that an electrically conducting region of the atmosphere could account for observed variations of Earth's magnetic field. Sixty years later, Guglielmo Marconi received the first trans-Atlantic radio signal on December 12, 1901, in St. John's, Newfoundland (now in Canada) using a kite-supported antenna for reception. The transmitting station in Poldhu, Cornwall, used a spark-gap transmitter to produce a signal with a freq ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sisir Kumar Mitra
Sisir Kumar Mitra (or ''Shishirkumar Mitra'') MBE, FNI, FASB, FIAS, FRS (24 October 1890 – 13 August 1963) was an Indian physicist. Early life and education Mitra was born in his father's hometown of Konnagar, a suburb of Kolkata (then Calcutta) located in the Hooghly District in the Bengal Presidency (present-day West Bengal). He was the third son of Joykrishna Mitra, who was a schoolteacher at the time of Mitra's birth, and Saratkumari, a medical student whose family came from Midnapore. While Mitra's paternal family were orthodox Hindus, his mother's family were adherents of the progressive Brahmo Samaj, and were noted in Midnapore for their advanced outlook. In 1878, Joykrishna Mitra had joined the Brahmo Samaj and married his wife, against the wishes of his family, who responded by severing ties with him. As a consequence, the newly wed couple moved to Saratkumari's hometown of Midnapore, where Joykrishna and his wife had two sons – Satish Kumar and Santosh Kumar – ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Padma Bhushan Award Recipients (1960–1969)
The Padma Bhushan is the third-highest civilian award of the Republic of India. Instituted on 2January 1954, the award is given for "distinguished service of a high order", without distinction of race, occupation, position, or sex. The recipients receive a ''Sanad'', a certificate signed by the President of India and a circular-shaped medallion with no monetary association. The recipients are announced every year on Republic Day (26January) and registered in ''The Gazette of India''a publication used for official government notices and released weekly by the Department of Publication, under the Ministry of Urban Development. The conferral of the award is not considered official without its publication in the ''Gazette''. The name of recipient, whose award have been revoked or restored, both of which require the authority of the President, is archived and they are required to surrender their medal when their name is struck from the register; none of the conferments of Padma Bhush ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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