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Reva Williams
Reva Kay Williams is an American astrophysicist. Williams is the first Black American woman to receive a Ph.D. in theoretical astrophysics and the first person to successfully work out the Penrose process using Einstein's Theory of Relativity to extract energy from black holes. Early life and education Williams was born in Memphis, Tennessee and moved to Chicago at the age of 6. She received an A.A. in liberal arts from Malcolm X College in 1977 and a B.A. in astronomy from Northwestern University in 1980. Williams completed both a M.A. and a Ph.D. at Indiana University Bloomington, and when she completed her degree in 1991 she became the first Black American woman to receive a doctorate in astrophysics. Penrose process With the publication of her Ph.D. thesis in 1991, Williams became the first person to work out the Penrose process of black holes. In 1995, Williams published a paper in Physical Review of research from her Ph.D. thesis. Her calculations explained that black ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
University Of Toledo
The University of Toledo (UToledo or UT) is a public research university in Toledo, Ohio. It is the northernmost campus of the University System of Ohio. The university also operates a Health Science campus, which includes the University of Toledo Medical Center, in the West Toledo neighborhood of Toledo; a satellite campus in the Scott Park neighborhood of Toledo; the Center for the Visual Arts is located in downtown Toledo at the Toledo Museum of Art; and a research and education facility, known as the Lake Erie Center, at Maumee Bay State Park. The university was founded in 1872 in downtown Toledo as the Toledo University of Arts and Trades. It closed after six years. The city of Toledo took it over, reopening it in 1884 as the Toledo Manual Training School. The vocational school was developed as a university through the late 1800s. In 1931 the university moved to its current location in the Ottawa neighborhood. Since its establishment, the university has physically exp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physical Review
''Physical Review'' is a peer-reviewed scientific journal established in 1893 by Edward Nichols. It publishes original research as well as scientific and literature reviews on all aspects of physics. It is published by the American Physical Society (APS). The journal is in its third series, and is split in several sub-journals each covering a particular field of physics. It has a sister journal, ''Physical Review Letters'', which publishes shorter articles of broader interest. History ''Physical Review'' commenced publication in July 1893, organized by Cornell University professor Edward Nichols and helped by the new president of Cornell, J. Gould Schurman. The journal was managed and edited at Cornell in upstate New York from 1893 to 1913 by Nichols, Ernest Merritt, and Frederick Bedell. The 33 volumes published during this time constitute ''Physical Review Series I''. The American Physical Society (APS), founded in 1899, took over its publication in 1913 and star ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Geophysical Union
The American Geophysical Union (AGU) is a 501(c)(3) nonprofit organization of Earth, atmospheric, ocean, hydrologic, space, and planetary scientists and enthusiasts that according to their website includes 130,000 people (not members). AGU's activities are focused on the organization and dissemination of scientific information in the interdisciplinary and international fields within the Earth and space sciences. The geophysical sciences involve four fundamental areas: atmospheric and ocean sciences; solid-Earth sciences; hydrologic sciences; and space sciences. The organization's headquarters is located on Florida Avenue in Washington, D.C. History The AGU was established in December 1919 by the National Research Council (NRC) to represent the United States in the International Union of Geodesy and Geophysics (IUGG), and its first chairman was William Bowie of the United States Coast and Geodetic Survey (USCGS). For more than 50 years, it operated as an unincorporated affili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extragalactic Astronomy
Extragalactic astronomy is the branch of astronomy concerned with objects outside the Milky Way galaxy. In other words, it is the study of all astronomical objects which are not covered by galactic astronomy. The closest objects in extragalactic astronomy include the galaxies of the Local Group, which are close enough to allow very detailed analyses of their contents (e.g. supernova remnants, stellar associations). As instrumentation has improved, distant objects can now be examined in more detail and so extragalactic astronomy includes objects at nearly the edge of the observable universe. Research into distant galaxies (outside of our local group) is valuable for studying aspects of the universe such as galaxy evolution and Active Galactic Nuclei (AGN) which give insight into physical phenomena (e.g. super massive black hole accretion and the presence of dark matter). It is through extragalactic astronomy that astronomers and physicists are able to study the effects of General ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cosmology
Cosmology () is a branch of physics and metaphysics dealing with the nature of the universe. The term ''cosmology'' was first used in English in 1656 in Thomas Blount (lexicographer), Thomas Blount's ''Glossographia'', and in 1731 taken up in Latin by German philosophy, German philosopher Christian Wolff (philosopher), Christian Wolff, in ''Cosmologia Generalis''. Religious cosmology, Religious or mythological cosmology is a body of beliefs based on Mythology, mythological, Religion, religious, and Esotericism, esoteric literature and traditions of Cosmogony, creation myths and eschatology. In the science of astronomy it is concerned with the study of the chronology of the universe. Physical cosmology is the study of the observable universe's origin, its large-scale structures and dynamics, and the ultimate fate of the universe, including the laws of science that govern these areas. It is investigated by scientists, such as astronomers and physicists, as well as Philosophy, ph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
General Relativity
General relativity, also known as the general theory of relativity and Einstein's theory of gravity, is the geometric theory of gravitation published by Albert Einstein in 1915 and is the current description of gravitation in modern physics. General relativity generalizes special relativity and refines Newton's law of universal gravitation, providing a unified description of gravity as a geometric property of space and time or four-dimensional spacetime. In particular, the ' is directly related to the energy and momentum of whatever matter and radiation are present. The relation is specified by the Einstein field equations, a system of second order partial differential equations. Newton's law of universal gravitation, which describes classical gravity, can be seen as a prediction of general relativity for the almost flat spacetime geometry around stationary mass distributions. Some predictions of general relativity, however, are beyond Newton's law of universal gravitat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Science Foundation
The National Science Foundation (NSF) is an independent agency of the United States government that supports fundamental research and education in all the non-medical fields of science and engineering. Its medical counterpart is the National Institutes of Health. With an annual budget of about $8.3 billion (fiscal year 2020), the NSF funds approximately 25% of all federally supported basic research conducted by the United States' colleges and universities. In some fields, such as mathematics, computer science, economics, and the social sciences, the NSF is the major source of federal backing. The NSF's director and deputy director are appointed by the President of the United States and confirmed by the United States Senate, whereas the 24 president-appointed members of the National Science Board (NSB) do not require Senate confirmation. The director and deputy director are responsible for administration, planning, budgeting and day-to-day operations of the foundation, while t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microquasar
A microquasar, the smaller version of a quasar, is a compact region surrounding a stellar black hole with a mass several times that of its companion star. The matter being pulled from the companion star forms an accretion disk around the black hole. This accretion disk may become so hot, due to friction, that it begins to emit X-rays. The disk also projects narrow streams or " jets" of subatomic particles at near-light speed, generating a strong radio wave emission. Overview In 1979, SS 433 became the first microquasar to be discovered. It was thought to be the most exotic case until similar objects such as GRS 1915+105 were discovered in 1994. In some cases, blobs or "knots" of brighter plasma within the jets appear to be traveling faster than the speed of light, an optical illusion called superluminal motion which is caused by sub-light-speed particles being projected at a small angle relative to the observer. The 1996 Bruno Rossi Prize of the American Astronomical Society wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Socorro, New Mexico
Socorro (, '' sə-KOR-oh'') is a city in Socorro County in the U.S. state of New Mexico. It is in the Rio Grande Valley at an elevation of . In 2010 the population was 9,051. It is the county seat of Socorro County. Socorro is located south of Albuquerque and north of Las Cruces. History Founding In June 1598, Juan de Oñate led a group of Spanish settlers through the Jornada del Muerto, an inhospitable patch of desert that ends just south of the present-day city of Socorro. As the Spaniards emerged from the desert, Piro Indians of the pueblo of Teypana gave them food and water. Therefore, the Spaniards renamed this pueblo Socorro, which means "help" or "aid". Later, the name "Socorro" would be applied to the nearby Piro pueblo of Pilabó. Nuestra Señora de Perpetuo Socorro, the first Catholic mission in the area, was probably established c. 1626. Fray Agustín de Vetancurt would later write that around 600 people lived in the area during this period. Mines in the Socorr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aspen, Colorado
Aspen is a home rule municipality that is the county seat and the most populous municipality of Pitkin County, Colorado, United States. The city population was 7,004 at the 2020 United States Census. Aspen is in a remote area of the Rocky Mountains' Sawatch Range and Elk Mountains, along the Roaring Fork River at an elevation just below above sea level on the Western Slope, west of the Continental Divide. Aspen is now a part of the Glenwood Springs, CO Micropolitan Statistical Area. Founded as a mining camp during the Colorado Silver Boom and later named Aspen for the abundance of aspen trees in the area, the city boomed during the 1880s, its first decade. The boom ended when the Panic of 1893 led to a collapse of the silver market. For the next half-century, known as "the quiet years", the population steadily declined, reaching a nadir of fewer than 1000 by 1930. Aspen's fortunes recovered in the mid-20th century when neighboring Aspen Mountain was developed into a ski ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Carolina A&T State University
North Carolina Agricultural and Technical State University (also known as North Carolina A&T State University, North Carolina A&T, N.C. A&T, or simply A&T) is a public, historically black land-grant research university in Greensboro, North Carolina. It is a constituent institution of the University of North Carolina System. Founded by the North Carolina General Assembly on March 9, 1891, as the Agricultural and Mechanical College for the Colored Race, it is the second college established under the provisions of the Morrill Act of 1890, as well as the first for people of color in the State of North Carolina. Initially, the college offered instruction in agriculture, English, horticulture and mathematics. In 1967, the college was designated a Regional University by the North Carolina General Assembly and renamed North Carolina Agricultural and Technical State University. With an enrollment of over 13,000 students, North Carolina A&T is the largest historically black college or uni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Research Council (United States)
The National Academies of Sciences, Engineering, and Medicine (also known as NASEM or the National Academies) are the collective scientific national academy of the United States. The name is used interchangeably in two senses: (1) as an umbrella term for its three quasi-independent honorific member organizations the National Academy of Sciences (NAS), the National Academy of Engineering (NAE), and the National Academy of Medicine (NAM); and (2) as the brand for studies and reports issued by the operating arm of the three academies, the National Research Council (NRC). The NRC was first formed in 1916 as an activity of the NAS. Now jointly governed by all three academies, the NRC produces some 200 publications annually which are published by the National Academies Press. The reports produced by the National Academies have been characterized as reflective of scientific consensus. History The US National Academy of Sciences was created by an Act of Incorporation dated March 3, 18 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
