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OMC-1
The Orion molecular cloud complex (or, simply, the Orion complex) is a star-forming region with stellar ages ranging up to 12 Myr. Two Molecular cloud#Giant molecular clouds, giant molecular clouds are a part of it, Orion A and Orion B. The stars currently forming within the complex are located within these clouds. A number of other somewhat older stars no longer associated with the molecular gas are also part of the complex, most notably the Orion's Belt (Orion OB1b), as well as the dispersed population north of it (Orion OB1, Orion OB1a). Near the head of Orion there is also a population of young stars that is centered on Meissa. The complex is between 1 000 and 1 400 light-years away, and hundreds of light-years across. The Orion complex is one of the most active regions of nearby star formation, stellar formation visible in the night sky, and is home to both protoplanetary discs and very young stars. Much of it is bright in infrared wavelengths due to the heat-intens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
H II Region
An H II region or HII region is a region of interstellar atomic hydrogen that is ionized. It is typically in a molecular cloud of partially ionized gas in which star formation has recently taken place, with a size ranging from one to hundreds of light years, and density from a few to about a million particles per cubic centimetre. The Orion Nebula, now known to be an H II region, was observed in 1610 by Nicolas-Claude Fabri de Peiresc by telescope, the first such object discovered. The regions may be of any shape because the distribution of the stars and gas inside them is irregular. Hertzsprung-Russell diagram, The short-lived blue stars created in these regions emit copious amounts of ultraviolet light that ionize the surrounding gas. H II regions—sometimes several hundred light-years across—are often associated with giant molecular clouds. They often appear clumpy and filamentary, sometimes showing intricate shapes such as the Horsehead Nebula. H II regio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kleinmann–Low Nebula
The Kleinmann–Low Nebula (also known as the Orion KL Nebula) is an active star forming region in the Milky Way galaxy. It is a cluster of stars within a molecular cloud.Ferland pp191 The Kleinmann–Low Nebula is at the heart of the Orion Nebula, and is the most active star-forming region in it. Because of the thick dust surrounding it, it is observed primarily with infrared light, since visible light cannot pass through it. Hot stellar winds circulate off large, young, stars in Orion's nebula and heat the surrounding gas. This then causes an explosion that has a finger-like intrusion look. It is named after Douglas Kleinmann and Frank J. Low, who discovered the nebula in 1967. Between 1972 and 1973 a large amount of maps were secured with the Steward and Catalina Observatories telescopes. The luminosity of the Kleinmann–Low Nebula is approximately , or roughly 105 times that of the sun, making the nebula the brightest component of the OMC-1 Complex. The temperature of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
J2000
In astronomy, an epoch or reference epoch is a moment in time used as a reference point for some time-varying astronomical quantity. It is useful for the celestial coordinates or orbital elements of a celestial body, as they are subject to perturbations and vary with time. These time-varying astronomical quantities might include, for example, the mean longitude or mean anomaly of a body, the node of its orbit relative to a reference plane, the direction of the apogee or aphelion of its orbit, or the size of the major axis of its orbit. The main use of astronomical quantities specified in this way is to calculate other relevant parameters of motion, in order to predict future positions and velocities. The applied tools of the disciplines of celestial mechanics or its subfield orbital mechanics (for predicting orbital paths and positions for bodies in motion under the gravitational effects of other bodies) can be used to generate an ephemeris, a table of values giving the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telescope
A telescope is a device used to observe distant objects by their emission, absorption, or reflection of electromagnetic radiation. Originally meaning only an optical instrument using lenses, curved mirrors, or a combination of both to observe distant objects, the word ''telescope'' now refers to a wide range of instruments capable of detecting different regions of the electromagnetic spectrum, and in some cases other types of detectors. The first known practical telescopes were refracting telescopes with glass lenses and were invented in the Netherlands at the beginning of the 17th century. They were used for both terrestrial applications and astronomy. The reflecting telescope, which uses mirrors to collect and focus light, was invented within a few decades of the first refracting telescope. In the 20th century, many new types of telescopes were invented, including radio telescopes in the 1930s and infrared telescopes in the 1960s. Etymology The word ''telescope'' was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NGC 1981
NGC 1981 (also known as OCL 525) is an open cluster which is located in the constellation Orion. It was discovered by John Herschel on 4 January 1827. Its apparent magnitude is 4.2 and its size is 28.00 arc minutes. It lies to the north of the Orion Nebula, separated from it by the Sh2-279 region containing NGC 1973, 1975, and 1977. Some say it looks like an alligator or crocodile, with its eastern star as the snout, its western star as its tail and the two groups of three stars in the middle of it as its two set of legs. References External links * Open clusters Orion molecular cloud complex 1981 Events January * January 1 ** Greece enters the European Economic Community, predecessor of the European Union. ** Palau becomes a self-governing territory. * January 10 – Salvadoran Civil War: The FMLN launches its first major offensiv ... Orion (constellation) Astronomical objects discovered in 1827 Discoveries by John Herschel Orion–Cygnus Arm { ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orion Molecular Cloud 4
Orion () may refer to: Common meanings * Orion (constellation), named after the mythical hunter * Orion (mythology), a hunter in Greek mythology * Orion (spacecraft), NASA crew vehicle first launched in 2022 Arts and media Fictional entities Characters and species * Orion (character), a DC Comics character * Orion (''Star Trek''), a sentient alien species * Orion, code name of Stephen J. Bartowski on the television show ''Chuck'' * Orion, in the fighting game ''Brawlhalla'' * Orions, a race in the '' Starfire'' board game and book series * Orion, a character from ''Power Rangers Super Megaforce'' * Captain Orion, in the Japanese series '' X-Bomber'' Vessels * ''Orion'', a spaceplane in the film ''2001: A Space Odyssey'' * ''Orion'', a spaceship in '' Raumpatrouille Orion'' (''Space Patrol Orion'' in English), the first German science fiction television series * ''"Orion"''-class spaceship, on the television series '' Ascension'' Literature * ''Orion'', an 18 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orion Molecular Cloud 3
Orion () may refer to: Common meanings * Orion (constellation), named after the mythical hunter * Orion (mythology), a hunter in Greek mythology * Orion (spacecraft), NASA crew vehicle first launched in 2022 Arts and media Fictional entities Characters and species * Orion (character), a DC Comics character * Orion (''Star Trek''), a sentient alien species * Orion, code name of Stephen J. Bartowski on the television show ''Chuck'' * Orion, in the fighting game ''Brawlhalla'' * Orions, a race in the '' Starfire'' board game and book series * Orion, a character from ''Power Rangers Super Megaforce'' * Captain Orion, in the Japanese series '' X-Bomber'' Vessels * ''Orion'', a spaceplane in the film ''2001: A Space Odyssey'' * ''Orion'', a spaceship in '' Raumpatrouille Orion'' (''Space Patrol Orion'' in English), the first German science fiction television series * ''"Orion"''-class spaceship, on the television series '' Ascension'' Literature * ''Orion'', an 18 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orion Molecular Cloud 2
Orion () may refer to: Common meanings * Orion (constellation), named after the mythical hunter * Orion (mythology), a hunter in Greek mythology * Orion (spacecraft), NASA crew vehicle first launched in 2022 Arts and media Fictional entities Characters and species * Orion (character), a DC Comics character * Orion (''Star Trek''), a sentient alien species * Orion, code name of Stephen J. Bartowski on the television show ''Chuck'' * Orion, in the fighting game ''Brawlhalla'' * Orions, a race in the '' Starfire'' board game and book series * Orion, a character from ''Power Rangers Super Megaforce'' * Captain Orion, in the Japanese series '' X-Bomber'' Vessels * ''Orion'', a spaceplane in the film ''2001: A Space Odyssey'' * ''Orion'', a spaceship in ''Raumpatrouille Orion'' (''Space Patrol Orion'' in English), the first German science fiction television series * ''"Orion"''-class spaceship, on the television series ''Ascension (miniseries), Ascension'' Literatur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Becklin–Neugebauer Object
The Becklin–Neugebauer Object (BN) is an object visible only in the infrared in the Orion molecular cloud 1 (OMC1). It was discovered in 1967 by Eric Becklin and Gerry Neugebauer during their near-infrared survey of the Orion Nebula. A faint glow around the center-most stars can be observed in the visible light spectrum, especially with the aid of a telescope. The BN Object is thought to be an intermediate-mass protostar. It was the first star detected using infrared methods and is deeply embedded within the Orion star-forming nebula, where it is invisible at optical wavelengths because the light is completely scattered or absorbed due to the high density of dusty material. Near-infrared polarized light observations showed that the star BN is still surrounded by a circumstellar disk. Past ejection of BN BN moves towards the northwest with respect to other stars in the Kleinmann-Low nebula. A proper motion of between 21 and 27 km/s in the northwest region and a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orion Molecular Cloud 1
Orion () may refer to: Common meanings * Orion (constellation), named after the mythical hunter * Orion (mythology), a hunter in Greek mythology * Orion (spacecraft), NASA crew vehicle first launched in 2022 Arts and media Fictional entities Characters and species * Orion (character), a DC Comics character * Orion (''Star Trek''), a sentient alien species * Orion, code name of Stephen J. Bartowski on the television show ''Chuck'' * Orion, in the fighting game ''Brawlhalla'' * Orions, a race in the '' Starfire'' board game and book series * Orion, a character from ''Power Rangers Super Megaforce'' * Captain Orion, in the Japanese series '' X-Bomber'' Vessels * ''Orion'', a spaceplane in the film ''2001: A Space Odyssey'' * ''Orion'', a spaceship in '' Raumpatrouille Orion'' (''Space Patrol Orion'' in English), the first German science fiction television series * ''"Orion"''-class spaceship, on the television series '' Ascension'' Literature * ''Orion'', an 18 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NGC 1980
NGC 1980 (also known as OCL 529, Collinder 72 and The Lost Jewel of Orion) is a young open cluster associated with an emission nebula in the constellation Orion. It was discovered by William Herschel Frederick William Herschel (; german: Friedrich Wilhelm Herschel; 15 November 1738 – 25 August 1822) was a German-born British astronomer and composer. He frequently collaborated with his younger sister and fellow astronomer Caroline ... on 31 January 1786. Its apparent size is 14 × 14 arc minutes and it is located around the star Iota Orionis on the southern tip of the Orion constellation. Herschel made his first observation of the cluster which was called WH V 31 on 31 January 1786, but he possibly observed it during his studies of double stars on 20 September 1783. References Open clusters Orion molecular cloud complex 1980 Orion (constellation) Astronomical objects discovered in 1783 Discoveries by William Herschel Orion–Cygnus Arm {{star-clu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sh2-279
Sh2-279 (alternatively designated S279 or Sharpless 279) is an HII region and bright nebulae that includes a reflection nebula located in the constellation Orion. It is the northernmost part of the asterism known as Orion's Sword, lying 0.6° north of the Orion Nebula. The reflection nebula embedded in Sh2-279 is popularly known as the Running Man Nebula. Sh2-279 comprises three NGC nebulae, NGC 1973, NGC 1975, and NGC 1977 that are divided by darker nebulous regions. It also includes the open cluster NGC 1981. The brightest nebulosity, later listed as NGC 1977, was discovered by William Herschel in 1786. He catalogued it as "H V 30" and described "!! 42 Orionis and neb la. The two smaller reflection nebulae were first noted by German astronomer Heinrich Louis d'Arrest, NGC 1973 in 1862 and NGC 1975 in 1864. All three were included in the New General Catalogue in 1888. The designation NGC 1977 is used in various sources for the reflection area around 42 Orionis (the south-e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
