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Mayall II
Mayall II, also known as NGC-224-G1, SKHB 1, GSC 2788:2139, HBK 0-1, M31GC J003247+393440 or Andromeda's Cluster, is a globular cluster orbiting M31, the Andromeda Galaxy. It is located from the Andromeda Galaxy's galactic core, and is the brightest (by absolute magnitude) globular cluster in the Local Group, having an apparent magnitude of 13.81 in V band. Mayall II is considered to have twice the mass of Omega Centauri, and may contain a central, intermediate-mass (∼ 2 M⊙) black hole. It was first identified as a possible globular cluster by American astronomers Nicholas Mayall and Olin J. Eggen in 1953 using a Palomar Schmidt plate exposed in 1948. Because of the widespread distribution of metallicity, indicating multiple star generations and a large stellar creation period, many contend that it is not a true globular cluster, but is actually the galactic core that remains of a dwarf galaxy consumed by Andromeda. Origin of names * Mayall II is named after Nicholas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HST G1 (Mayall II)
HST may refer to: Science and technology * The Hubble Space Telescope * Harvard–MIT Program of Health Sciences and Technology * The history of science and technology * High-speed telegraphy, a radiosport * High-Speed Transfer, a USRobotics modem protocol * Highstand systems tract, in the sequence stratigraphy branch of geology Transportation * Helsinki City Transport (Swedish: ') * Heritage Shunters Trust, an English rail preservation society * InterCity 125 or High Speed Train, UK * High Street (Glasgow) railway station, Scotland, station code Other uses * Half-Square or Half Square Triangle a block in quilting * Harmonized sales tax, in Canada * Hawaii-Aleutian Standard Time (UTC−10) * Hegemonic stability theory, in international relations * Helicopter support team, in the United States Marine Corps * High Sierra Trail, in California, United States * Holden Street Theatres, Adelaide, Australia * Homestead Air Reserve Base, Florida, US, IATA code * Hospital Santo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olin J
Olin may refer to: People Organizations * OLIN, American landscape architecture firm * Olin Business School at Washington University in St. Louis * Olin College, an undergraduate engineering college in Massachusetts * Olin Corporation, a chemical corporation with a history of producing chemicals and ammunition * Olin Edirne, the former name of Turkish basketball team Eskişehir Basket * F. W. Olin Foundation, a foundation endowed by Franklin W. Olin * John M. Olin Foundation, a foundation endowed by John M. Olin * Preston and Olin Institute, a defunct Methodist boys' school now a part of Virginia Tech Places * Olin, Iowa, a small city in the United States * Olin, North Carolina, an unincorporated community in the United States * Olin, Poland * Olin's Covered Bridge, the only bridge in Ashtabula county, Ohio named for a family * Olin Observatory, an astronomical observatory in New London, Connecticut * Olin Sang Ruby Union Institute, a Jewish overnight summer camp in Wisconsin F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mayall's Object
Mayall's Object (also classified under the Atlas of Peculiar Galaxies as Arp 148) is the result of two colliding galaxies located 500 million light years away within the constellation of Ursa Major. It was discovered by American astronomer Nicholas U. Mayall of the Lick Observatory on 13 March 1940, using the Crossley reflector. When first discovered, Mayall's Object was described as a peculiar nebula, shaped like a question mark. Originally theorized to represent a galaxy reacting with the intergalactic medium, it is now thought to represent the collision of two galaxies, resulting in a new object consisting of a ring-shaped galaxy with a tail emerging from it. It is thought that the collision between the two galaxies created a shockwave that initially drew matter into the center which then formed the ring. Arp 148 was imaged by the Hubble Space Telescope as part of a survey of what are thought to be colliding galaxies. The image was taken with Wide Field and Planetary Camera 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Messier 54
Messier 54 (also known as M54 or NGC 6715) is a globular cluster in the constellation Sagittarius. It was discovered by Charles Messier in 1778 and then included in his catalog of comet-like objects. It is easily found in the sky, being close to the star ζ Sagittarii. It is, however, not resolvable into individual stars even with larger amateur telescopes. In July 2009, a team of astronomers reported that they had found evidence of an intermediate-mass black hole in the core of M54. Distance Previously thought to belong to the Milky Way at a distance from Earth of about 50,000 light-years, it was discovered in 1994 that M54 most likely belongs to the Sagittarius Dwarf Elliptical Galaxy (''SagDEG''), making it the first globular cluster formerly thought to be part of our galaxy reassigned to extragalactic status, even if not recognized as such for nearly two and a quarter centuries. As it is located in SagDEG's center, some authors think it actually may be its core; howev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Huchra
John Peter Huchra ( ; December 23, 1948 – October 8, 2010) was an American astronomer and professor. He was the Vice Provost for Research Policy at Harvard University and a Professor of Astronomy at the Center for Astrophysics Harvard & Smithsonian.AAS Officers [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sidney Van Den Bergh
Sidney Van den Bergh, OC, FRS (born 20 May 1929 in Wassenaar) is a retired Dutch-Canadian astronomer. He showed an interest in science from an early age, learning to read with books on astronomy. In addition to being interested in astronomy. He also liked geology and archeology. His parents got him science books, a telescope, and a microscope, although they wished him to pursue a more practical career and only follow astronomy as a hobby. He went to Leiden University in the Netherlands from 1947 to 1948. He then attended Princeton University on scholarship where he received his A.B. in 1950. In December 1950, he was living in Columbus, Ohio and evidencing an interest in Astronomy. He obtained an MSc from Ohio State University (1952) and a Dr. rer. nat. from the University of Göttingen (1956). He took a faculty position at Ohio State University from 1956 to 1958 before moving to Toronto in 1958 where he spent the first part of his career at the David Dunlap Observatory (DDO ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles T
Charles is a masculine given name predominantly found in English and French speaking countries. It is from the French form ''Charles'' of the Proto-Germanic name (in runic alphabet) or ''*karilaz'' (in Latin alphabet), whose meaning was "free man". The Old English descendant of this word was '' Ċearl'' or ''Ċeorl'', as the name of King Cearl of Mercia, that disappeared after the Norman conquest of England. The name was notably borne by Charlemagne (Charles the Great), and was at the time Latinized as ''Karolus'' (as in ''Vita Karoli Magni''), later also as '' Carolus''. Some Germanic languages, for example Dutch and German, have retained the word in two separate senses. In the particular case of Dutch, ''Karel'' refers to the given name, whereas the noun ''kerel'' means "a bloke, fellow, man". Etymology The name's etymology is a Common Germanic noun ''*karilaz'' meaning "free man", which survives in English as churl (< Old English ''ċeorl''), which developed its depr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wallace L
Wallace may refer to: People * Clan Wallace in Scotland * Wallace (given name) * Wallace (surname) * Wallace (footballer, born 1986), full name Wallace Fernando Pereira, Brazilian football left-back * Wallace (footballer, born 1987), full name Wallace Reis da Silva, Brazilian football centre-back * Wallace (footballer, born May 1994), full name Wallace Oliveira dos Santos, Brazilian football full-back * Wallace (footballer, born October 1994), full name Wallace Fortuna dos Santos, Brazilian football centre-back * Wallace (footballer, born 1998), full name Wallace Menezes dos Santos, Brazilian football midfielder Fictional characters * Wallace, from ''Wallace and Gromit'' * Wallace (''Pokémon'') * Wallace (''Sin City'') * Wallace (''The Wire'') * Wallace Breen, from ''Half-Life 2'' * Wallace Fennel, from ''Veronica Mars'' * Wallace Footrot, from ''Footrot Flats'' * Eli Wallace, from ''Stargate Universe'' * Wallace, from "The Hangover Part III" * Wallace the Brave, from the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nicholas U
Nicholas is a male given name and a surname. The Eastern Orthodox Church, the Roman Catholic Church, and the Anglican Churches celebrate Saint Nicholas every year on December 6, which is the name day for "Nicholas". In Greece, the name and its derivatives are especially popular in maritime regions, as St. Nicholas is considered the protector saint of seafarers. Origins The name is derived from the Greek name Νικόλαος (''Nikolaos''), understood to mean 'victory of the people', being a compound of νίκη ''nikē'' 'victory' and λαός ''laos'' 'people'.. An ancient paretymology of the latter is that originates from λᾶς ''las'' ( contracted form of λᾶας ''laas'') meaning 'stone' or 'rock', as in Greek mythology, Deucalion and Pyrrha recreated the people after they had vanished in a catastrophic deluge, by throwing stones behind their shoulders while they kept marching on. The name became popular through Saint Nicholas, Bishop of Myra in Lycia, the inspir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dwarf Galaxy
A dwarf galaxy is a small galaxy composed of about 1000 up to several billion stars, as compared to the Milky Way's 200–400 billion stars. The Large Magellanic Cloud, which closely orbits the Milky Way and contains over 30 billion stars, is sometimes classified as a dwarf galaxy; others consider it a full-fledged galaxy. Dwarf galaxies' formation and activity are thought to be heavily influenced by interactions with larger galaxies. Astronomers identify numerous types of dwarf galaxies, based on their shape and composition. Formation One theory states that most galaxies, including dwarf galaxies, form in association with dark matter, or from gas that contains metals. However, NASA's Galaxy Evolution Explorer space probe identified new dwarf galaxies forming out of gases with low metallicity. These galaxies were located in the Leo Ring, a cloud of hydrogen and helium around two massive galaxies in the constellation Leo. Because of their small size, dwarf galaxies have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Star
A star is an astronomical object comprising a luminous spheroid of plasma (physics), plasma held together by its gravity. The List of nearest stars and brown dwarfs, nearest star to Earth is the Sun. Many other stars are visible to the naked eye at night sky, night, but their immense distances from Earth make them appear as fixed stars, fixed points of light. The most prominent stars have been categorised into constellations and asterism (astronomy), asterisms, and many of the brightest stars have proper names. Astronomers have assembled star catalogues that identify the known stars and provide standardized stellar designations. The observable universe contains an estimated to stars. Only about 4,000 of these stars are visible to the naked eye, all within the Milky Way galaxy. A star's life star formation, begins with the gravitational collapse of a gaseous nebula of material composed primarily of hydrogen, along with helium and trace amounts of heavier elements. Its stellar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metallicity
In astronomy, metallicity is the abundance of elements present in an object that are heavier than hydrogen and helium. Most of the normal physical matter in the Universe is either hydrogen or helium, and astronomers use the word ''"metals"'' as a convenient short term for ''"all elements except hydrogen and helium"''. This word-use is distinct from the conventional chemical or physical definition of a metal as an electrically conducting solid. Stars and nebulae with relatively high abundances of heavier elements are called "metal-rich" in astrophysical terms, even though many of those elements are nonmetals in chemistry. The presence of heavier elements hails from stellar nucleosynthesis, where the majority of elements heavier than hydrogen and helium in the Universe (''metals'', hereafter) are formed in the cores of stars as they evolve. Over time, stellar winds and supernovae deposit the metals into the surrounding environment, enriching the interstellar medium and providing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
