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UGC 12158
UGC 12158 or PGC 69533 is an Sb-type barred spiral galaxy located approximately away from Earth in the constellation of Pegasus. Its tight spiral disk spans approximately , whose scale at heliocentric distance is about 36.9 kiloparsecs per arcminute. It is also often stated to resemble the Milky Way in appearance, with a similar central bar and spiral arm structure. The earliest known reference to this galaxy comes from part 2 of the Morphological Catalogue of Galaxies, published in 1964, where it is listed as MCG +03-57-032. Supernova On 4 September 2004, Tom Boles discovered a 18.5v magnitude Type Ia supernova on one of the spiral arms near the apparent centre in UGC 12158. It was independently discovered by Mark Armstrong the following day, and subsequently designated SN 2004ef. (Blue star within UGC 12158 in Starbox Hubble's Space Telescope image.) Optical spectra was obtained on 7 September 2004 confirming the Type I classification. It reached 17.0v magnitude on 9 Septem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uppsala General Catalogue
The Uppsala General Catalogue of Galaxies (UGC) is a catalogue of 12,921 galaxies visible from the northern hemisphere. It was first published in 1973. The catalogue includes essentially all galaxies north of declination −02°30′ and to a limiting diameter of 1.0 arcminute or to a limiting apparent magnitude of 14.5. The primary source of data is the blue prints of the Palomar Observatory Sky Survey (POSS). It also includes galaxies smaller than 1.0 arcminute in diameter but brighter than 14.5 magnitude from the Catalogue of Galaxies and of Clusters of Galaxies (CGCG). The catalogue contains descriptions of the galaxies and their surrounding areas, plus conventional system classifications and position angles for flattened galaxies. Galaxy diameters are included and the classifications and descriptions are given in such a way as to provide as accurate an account as possible of the appearance of the galaxies on the prints. The accuracy of coordinates is only what is necessary f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morphological Catalogue Of Galaxies
The Morphological Catalogue of Galaxies (MCG) or Morfologiceskij Katalog Galaktik, is a Russian catalogue of 30,642 galaxies compiled by Boris Vorontsov-Velyaminov and V. P. Arkhipova. It is based on scrutiny of prints of the Palomar Sky Survey plates, and putatively complete to a photographic magnitude of 15. Including galaxies to magnitude 16 would have resulted in an unmanageably large dataset. Publication The catalogue was published in five parts (chapters) between 1962 and 1974, the final chapter including a certain number of galaxies with a photographic magnitude above 15. HEASARC Gallery [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MCG Objects
The Melbourne Cricket Ground (MCG), also known locally as the 'G, is a sports stadium located in Yarra Park, Melbourne, Victoria. Founded and managed by the Melbourne Cricket Club, it is the largest stadium in the Southern Hemisphere, the List of stadiums by capacity, eleventh-largest stadium globally, and List of cricket grounds by capacity, the second-largest cricket stadium by capacity. The MCG is within walking distance of the Melbourne City Centre, Melbourne CBD and is served by Richmond railway station, Melbourne, Richmond and Jolimont railway station, Jolimont railway stations, as well as the Melbourne tram route 70, route 70, Melbourne tram route 75, 75 and Melbourne tram route 48, 48 trams. It is adjacent to Melbourne Park and is an integral part of the Melbourne Sports and Entertainment Precinct. Since it was built in 1853, the MCG has undergone numerous renovations. It served as the main stadium for the 1956 Summer Olympics and the 2006 Commonwealth Games, as well a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UGC Objects
UGC may refer to: Organisations * Canadian Geophysical Union, official abbreviation in French (Union géophysique canadienne) * UGC (cinema operator), a European cinema chain, formerly Union Générale Cinématographique * UGC Fox Distribution, a former French-American film production company formed in 1995 * Union Graduate College, Schenectady, New York * United Grain Company, a Russian grain trading company based in Moscow * University Grants Commission (other) * University Grants Committee (other) * UnitedGlobalCom, former name of the cable TV operator Liberty Global * UnderGround Crips, an African American street gang mainly from Los Angeles, California Science and technology * Universal gravitational constant G, in physics * Uppsala General Catalogue, an astronomical catalogue of galaxies * UGC, a codon for cysteine * Unique games conjecture, a conjecture in computational complexity Other * User-generated content User-generated content (UGC), a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UGC 6093
UGC 6093 is a barred spiral galaxy located approximately 500 million light years (or about 153 megaparsecs) away from Earth in the constellation of Leo. This galaxy is known to host an active galactic nucleus, which is caused by the accretion of matter by a supermassive black hole located at its center, thus causing it to emit huge amounts of radiation and making UGC 6093's core shine excessively. This galaxy is also a megamaser, which means that it acts as a giant astronomical laser generating microwaves rather than visible light. Just like UGC 12158 and NGC 6744, it is considered a Milky Way twin in appearance, with a similar central bar and spiral arm structure. See also *UGC 12158 *Milky Way The Milky Way or Milky Way Galaxy is the galaxy that includes the Solar System, with the name describing the #Appearance, galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars in other arms of the galax ... References Barred spira ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SPT0418-47
SPT0418-47 is a gravitationally lensed, high-redshift, dusty star-forming galaxy, discovered with the South Pole Telescope. Observations with NASA's James Webb Space Telescope The James Webb Space Telescope (JWST) is a space telescope designed to conduct infrared astronomy. As the largest telescope in space, it is equipped with high-resolution and high-sensitivity instruments, allowing it to view objects too old, Lis ... (JWST) have revealed the presence of a companion galaxy, which may indicate that SPT0418-47 is a merging system of galaxies. In June 2023 detection of organic molecules in SPT0418-47 using the Webb telescope was announced. References {{Horologium (constellation) Horologium (constellation) Galaxies discovered in 2020 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NGC 6744
__NOTOC__ NGC 6744 (also known as Caldwell 101 or the Pavo Galaxy) is an intermediate spiral galaxy in the constellation Pavo (Peacock). Its velocity with respect to the cosmic microwave background is 802 ± 3km/s, which corresponds to a Hubble distance of . However, 21 ''non redshift'' measurements give a distance of . It was discovered on 30 June 1826 by Scottish astronomer James Dunlop, observing from Parramatta, Australia. One of the largest spiral galaxies in the local universe, NGC 6744 is considered a Milky Way mimic in the immediate vicinity, displaying remarkable star formation, flocculent (fluffy) arms, and an elongated core. It has at least one distorted companion galaxy (NGC 6744A) superficially similar to one of the Magellanic Clouds. NGC6744 is a LINER galaxy, i.e., its nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms. The galaxy has an active galactic nucleus (AGN) of low luminosity. NGC 6744 lies within the Virgo Supercl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NGC 1232
NGC 1232, also known as the Eye of God Galaxy (not to be confused with the Helix Nebula, also known as Eye of God) is an intermediate spiral galaxy about 50 million light-years away in the constellation Eridanus. It was discovered by German-British astronomer William Herschel on 20 October 1784. It is dominated by millions of bright stars and dark dust, in spiral arms rotating about the center. Open clusters containing bright blue stars are sprinkled along these spiral arms, with dark lanes of dense interstellar dust between. Less visible are dimmer stars and interstellar gas, comprising such a high mass that they dominate the dynamics of the inner galaxy. Not visible is matter of unknown form called dark matter, needed to explain the motions of the visible material in the outer galaxy. The galaxy is approximately 150,000 light-years across. The galaxy's spiral arms are not smooth and perturbed, leading to some suggesting a collision with a dwarf galaxy. However, some studies d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NGC 2336
NGC 2336 is a barred spiral galaxy located in the constellation Camelopardalis. It is located at a distance of circa 100 million light years from Earth, which, given its apparent dimensions, means that NGC 2336 is about 200,000 light years across. It was discovered by Wilhelm Tempel in 1876. Characteristics NGC 2336 is a barred spiral galaxy, featuring a small optical bar. At least 8 spiral arms, with numerous HII regions,Sandage, A., Bedke, J. (1994), ''The Carnegie Atlas of Galaxies. Volume I'', Carnegie Institution of Washington, p. 15 emanate from the ring-like structure around the bar. This ring has a radius of approximately 34 arcseconds, which corresponds to 5.3 kpc at the distance of NGC 2336. In the large arms of the galaxy have been observed 28 HII regions that may host young massive star clusters, and for two of them the nebular emission comprises most of the flux. Three of these HII areas have ages calculated to be 100 to 300 million years and have sizes between 300 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mark Armstrong (astronomer)
Mark Armstrong (born 1958) is a British amateur astronomer, a member of the British Astronomical Association. With his wife Claire Armstrong, he works from Rolvenden, Kent, England (obs. code 960). As of 2006, has 58 supernova discoveries (and 12 co-discoveries) to his credit in addition to two asteroid An asteroid is a minor planet—an object larger than a meteoroid that is neither a planet nor an identified comet—that orbits within the Solar System#Inner Solar System, inner Solar System or is co-orbital with Jupiter (Trojan asteroids). As ...s. References External links * ''Very short biography'' * ''Includes photo of Mark'' 1958 births 21st-century British astronomers 20th-century British astronomers Discoverers of asteroids * Living people People from Rolvenden {{UK-astronomer-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type Ia Supernova
A Type Ia supernova (read: "type one-A") is a type of supernova that occurs in binary systems (two stars orbiting one another) in which one of the stars is a white dwarf. The other star can be anything from a giant star to an even smaller white dwarf. Physically, carbon–oxygen white dwarfs with a low rate of rotation are limited to below 1.44 solar masses (). Beyond this "Chandrasekhar limit, critical mass", they reignite and in some cases trigger a supernova explosion; this critical mass is often referred to as the Chandrasekhar mass, but is marginally different from the absolute Chandrasekhar limit, where electron degeneracy pressure is unable to prevent catastrophic collapse. If a white dwarf gradually accretes mass from a binary companion, or merges with a second white dwarf, the general hypothesis is that a white dwarf's core will reach the ignition temperature for Carbon burning process, carbon fusion as it approaches the Chandrasekhar mass. Within a few seconds of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tom Boles
Thomas Boles (born 1944 in Lennoxtown in Scotland) is a Scottish amateur astronomer, discoverer of astronomical objects, author, broadcaster and former communications and computer engineer, who observes from his private "Coddenham Observatory" () in Coddenham, Suffolk, United Kingdom. He is known for having discovered a record number of supernovae. The main-belt asteroid 7648 Tomboles is named in his honor. He was President of the British Astronomical Association from 2003 to 2005 and Vice President from 2005 to 2007. He is a Fellow of the Royal Astronomical Society and an Examinations Moderator in astronomy with the International Baccalaureate. At the International Astronomical Union, he was a member of ''Division VIII Galaxies & the Universe'' and "Commission 28" until 2012 and 2015, respectively, and is a member of IAU's division C and J (Education, Outreach and Heritage; Galaxies and Cosmology). Boles has co-authored three text books on popular astronomy and has published ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
