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Void Galaxy
A void galaxy is a galaxy located in a cosmological void. Few galaxies exist in voids; most are located in sheets, walls and filaments that surround voids and supervoids.Astronomy and Astrophysics, "Results of a search for faint galaxies in voids", Kuhn, B.; Hopp, U.; Elsaesser, H.;, 'v.318', ''02/1997'', Many void galaxies are connected through void filaments or tendrils, lightweight versions of the regular galaxy filaments that surround voids. These filaments are often straighter than their regular counterparts due to the lack of influence by surrounding filaments. These filaments can even be rich enough to form poor groups of galaxies."Studies of Selected Voids. Faint Galaxies in the Direction of the Void 0049+05", G.T. Petrov, L. Slavcheva-Mihova, V. Kopchev, ''2007' ' The void galaxies themselves are thought to represent pristine examples of galactic evolution, having few neighbours, and likely to have formed from pure intergalactic gas.arXiv, "Cosmic Voids: structure, dy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galaxy
A galaxy is a system of stars, stellar remnants, interstellar gas, dust, dark matter, bound together by gravity. The word is derived from the Greek ' (), literally 'milky', a reference to the Milky Way galaxy that contains the Solar System. Galaxies, averaging an estimated 100 million stars, range in size from dwarfs with less than a hundred million stars, to the largest galaxies known – supergiants with one hundred trillion stars, each orbiting its galaxy's center of mass. Most of the mass in a typical galaxy is in the form of dark matter, with only a few percent of that mass visible in the form of stars and nebulae. Supermassive black holes are a common feature at the centres of galaxies. Galaxies are categorized according to their visual morphology as elliptical, spiral, or irregular. Many are thought to have supermassive black holes at their centers. The Milky Way's central black hole, known as Sagittarius A*, has a mass four million times greater than the Sun. As o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
G 1510+4727A
G, or g, is the seventh letter in the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''gee'' (pronounced ), plural ''gees''. History The letter 'G' was introduced in the Old Latin period as a variant of ' C' to distinguish voiced from voiceless . The recorded originator of 'G' is freedman Spurius Carvilius Ruga, who added letter G to the teaching of the Roman alphabet during the 3rd century BC: he was the first Roman to open a fee-paying school, around 230 BCE. At this time, ' K' had fallen out of favor, and 'C', which had formerly represented both and before open vowels, had come to express in all environments. Ruga's positioning of 'G' shows that alphabetic order related to the letters' values as Greek numerals was a concern even in the 3rd century BC. According to some records, the original seventh letter, 'Z', had been purged from the Latin alphabet somewhat ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emission-line Galaxy
A spectral line is a dark or bright line in an otherwise uniform and continuous spectrum, resulting from emission or absorption of light in a narrow frequency range, compared with the nearby frequencies. Spectral lines are often used to identify atoms and molecules. These "fingerprints" can be compared to the previously collected ones of atoms and molecules, and are thus used to identify the atomic and molecular components of stars and planets, which would otherwise be impossible. Types of line spectra Spectral lines are the result of interaction between a quantum system (usually atoms, but sometimes molecules or atomic nuclei) and a single photon. When a photon has about the right amount of energy (which is connected to its frequency) to allow a change in the energy state of the system (in the case of an atom this is usually an electron changing orbitals), the photon is absorbed. Then the energy will be spontaneously re-emitted, either as one photon at the same frequency a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CG 547
CG, Cg or cg may refer to: Arts and entertainment * Chaotic Good, an alignment in the role-playing game ''Dungeons & Dragons'' * Classical guitar, a type of guitar Businesses and organizations Businesses * Central of Georgia Railway, between Macon and Savannah, Georgia in the US *Chappe et Gessalin, a French automobile maker *Chaudhary Group, a multinational company based in Nepal * Cigna, formed in Hartford in 1865 as the Connecticut General Life Insurance Company * Colorado General Hospital, now known as University of Colorado Hospital *PNG Air, an airline from Papua New Guinea (IATA code CG) *The Carlyle Group, a private equity firm (stock symbol CG) Military units *Ceremonial Guard, an ''ad hoc'' military unit in the Canadian Forces *Coast guard, a national organization responsible for various services at sea Political parties *Galician Coalition, a Galician political party with a Galician nationalist and centrist ideology *Galician Convergence, a Galician political par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seyfert Galaxy
Seyfert galaxies are one of the two largest groups of active galaxies, along with quasars. They have quasar-like nuclei (very luminous, distant and bright sources of electromagnetic radiation) with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, their host galaxies are clearly detectable. Seyfert galaxies account for about 10% of all galaxies and are some of the most intensely studied objects in astronomy, as they are thought to be powered by the same phenomena that occur in quasars, although they are closer and less luminous than quasars. These galaxies have supermassive black holes at their centers which are surrounded by accretion discs of in-falling material. The accretion discs are believed to be the source of the observed ultraviolet radiation. Ultraviolet emission and absorption lines provide the best diagnostics for the composition of the surrounding material. Seen in visible light, most Seyfert galaxies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Markarian 845
Markarian (Armentian: Մարգարյան) or its Eastern Armenian variant Margaryan, is a common Armenian family name. Markarian may refer to: Persons *Benjamin Markarian (1913–1985), Armenian astrophysicist *Henri Markarian (1926–1985), better known as Marc Aryan, well-known Armenian-Belgian international singer *Hrant Markarian (born 1958), Armenian politician and head of the ARF * Roberto Markarian (born 1946), Uruguayan-Armenian mathematician, Rector of the University of the Republic 2014-2018 * Ronald Markarian (born 1931), United States Air Force Major General * Sergio Markarián (born 1944), Uruguayan-Armenian football coach and coach of national football team of Greece *Tatoul Markarian (born 1964), Armenian Ambassador most notably to the United States Space *Markarian's Chain, a stretch of galaxies that forms part of the Virgo Cluster *Markarian galaxies The Markarian galaxies are a class of galaxies that have nuclei with excessive amounts of ultraviolet emissio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IRAS 15195+5050
The Infrared Astronomical Satellite (Dutch: ''Infrarood Astronomische Satelliet'') (IRAS) was the first space telescope to perform a survey of the entire night sky at infrared wavelengths. Launched on 25 January 1983, its mission lasted ten months. The telescope was a joint project of the United States (NASA), the Netherlands ( NIVR), and the United Kingdom ( SERC). Over 250,000 infrared sources were observed at 12, 25, 60, and 100 micrometer wavelengths. Support for the processing and analysis of data from IRAS was contributed from the Infrared Processing and Analysis Center at the California Institute of Technology. Currently, the Infrared Science Archive at IPAC holds the IRAS archive. The success of IRAS led to interest in the 1985 Infrared Telescope (IRT) mission on the Space Shuttle, and the planned Shuttle Infrared Telescope Facility which eventually transformed into the Space Infrared Telescope Facility, SIRTF, which in turn was developed into the Spitzer Space Tel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
G 1517+3956B
G, or g, is the seventh letter in the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''gee'' (pronounced ), plural ''gees''. History The letter 'G' was introduced in the Old Latin period as a variant of ' C' to distinguish voiced from voiceless . The recorded originator of 'G' is freedman Spurius Carvilius Ruga, who added letter G to the teaching of the Roman alphabet during the 3rd century BC: he was the first Roman to open a fee-paying school, around 230 BCE. At this time, ' K' had fallen out of favor, and 'C', which had formerly represented both and before open vowels, had come to express in all environments. Ruga's positioning of 'G' shows that alphabetic order related to the letters' values as Greek numerals was a concern even in the 3rd century BC. According to some records, the original seventh letter, 'Z', had been purged from the Latin alphabet somewhat e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
G 1517+3956A
G, or g, is the seventh letter in the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''gee'' (pronounced ), plural ''gees''. History The letter 'G' was introduced in the Old Latin period as a variant of ' C' to distinguish voiced from voiceless . The recorded originator of 'G' is freedman Spurius Carvilius Ruga, who added letter G to the teaching of the Roman alphabet during the 3rd century BC: he was the first Roman to open a fee-paying school, around 230 BCE. At this time, ' K' had fallen out of favor, and 'C', which had formerly represented both and before open vowels, had come to express in all environments. Ruga's positioning of 'G' shows that alphabetic order related to the letters' values as Greek numerals was a concern even in the 3rd century BC. According to some records, the original seventh letter, 'Z', had been purged from the Latin alphabet somewhat ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
G 1517+3949
G, or g, is the seventh letter in the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''gee'' (pronounced ), plural ''gees''. History The letter 'G' was introduced in the Old Latin period as a variant of ' C' to distinguish voiced from voiceless . The recorded originator of 'G' is freedman Spurius Carvilius Ruga, who added letter G to the teaching of the Roman alphabet during the 3rd century BC: he was the first Roman to open a fee-paying school, around 230 BCE. At this time, ' K' had fallen out of favor, and 'C', which had formerly represented both and before open vowels, had come to express in all environments. Ruga's positioning of 'G' shows that alphabetic order related to the letters' values as Greek numerals was a concern even in the 3rd century BC. According to some records, the original seventh letter, 'Z', had been purged from the Latin alphabet somewhat ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FSS 1515+3823
FSS may refer to: Education * Faculty of Social Sciences, Charles University in Prague in the Czech Republic * Fernie Secondary School, in British Columbia, Canada * Friends Select School, in Philadelphia, Pennsylvania, United States * Frontenac Secondary School, in Kingston, Ontario, Canada Government * Federal Security Service (Russia) * Federal Supply Service, part of the United States General Services Administration * Financial Supervisory Service (South Korea) * Food Standards Scotland * Forensic and Scientific Services, an agency of the state government of Queensland, Australia * Forensic Science Service, a defunct British crown corporation * Foreign Service Specialist, Department of State Military * Fast Sealift Ship of the United States Navy * Fire Support Specialist, an artillery observer in the United States Army * RAF Kinloss, a former Royal Air Force station in Scotland Sport * Florida State Seminoles, the sports teams of Florida State University * Football ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BHI 1514+3819
BHI may refer to: * Beverly Hills Internet, former name of GeoCities, a web hosting service * BHI, station code for Birmingham International railway station, a United Kingdom railway station * Black Hebrew Israelites, African Americans who claim that they are descendants of the ancient Israelites * Black Hole Initiative, an interdisciplinary science program at Harvard University * Bristol Heart Institute, research and medical clinic in Bristol, England * British Horological Institute, the representative body of the horological industry in the United Kingdom * Brain heart infusion broth, a growth medium for growing microorganisms * Bald Head Island, North Carolina, a village located in Brunswick County, North Carolina, United States * BHI, former stock symbol of Baker Hughes, a General Electric (American) industrial service company * BHI, inventory number code assigned to all specimen or sample included in the catalogue of the Black Hills Institute of Geological Research The Bl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
