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Gum Nebula
The Gum Nebula (Gum 12) is an emission nebula that extends across 36° in the southern constellations Vela and Puppis. It lies approximately 450 parsecs from the Earth. Hard to distinguish, it was widely believed to be the greatly expanded (and still expanding) remains of a supernova that took place about a million years ago. More recent research suggests it may be an evolved H II region. It contains the 11,000-year-old Vela Supernova Remnant, along with the Vela Pulsar. The Gum Nebula contains about 32 cometary globules. These dense cloud cores are subject to such strong radiation from O-type stars γ2 Vel and ζ Pup and formerly the progenitor of the Vela Supernova Remnant that the cloud cores evaporate away from the hot stars into comet-like shapes. Like ordinary Bok globules, cometary globules are believed to be associated with star formation. It is named after its discoverer, the Australian astronomer Colin Stanley Gum (1924–1960). Gum had published his findings in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gum Nebula
The Gum Nebula (Gum 12) is an emission nebula that extends across 36° in the southern constellations Vela and Puppis. It lies approximately 450 parsecs from the Earth. Hard to distinguish, it was widely believed to be the greatly expanded (and still expanding) remains of a supernova that took place about a million years ago. More recent research suggests it may be an evolved H II region. It contains the 11,000-year-old Vela Supernova Remnant, along with the Vela Pulsar. The Gum Nebula contains about 32 cometary globules. These dense cloud cores are subject to such strong radiation from O-type stars γ2 Vel and ζ Pup and formerly the progenitor of the Vela Supernova Remnant that the cloud cores evaporate away from the hot stars into comet-like shapes. Like ordinary Bok globules, cometary globules are believed to be associated with star formation. It is named after its discoverer, the Australian astronomer Colin Stanley Gum (1924–1960). Gum had published his findings in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gum Nebula
The Gum Nebula (Gum 12) is an emission nebula that extends across 36° in the southern constellations Vela and Puppis. It lies approximately 450 parsecs from the Earth. Hard to distinguish, it was widely believed to be the greatly expanded (and still expanding) remains of a supernova that took place about a million years ago. More recent research suggests it may be an evolved H II region. It contains the 11,000-year-old Vela Supernova Remnant, along with the Vela Pulsar. The Gum Nebula contains about 32 cometary globules. These dense cloud cores are subject to such strong radiation from O-type stars γ2 Vel and ζ Pup and formerly the progenitor of the Vela Supernova Remnant that the cloud cores evaporate away from the hot stars into comet-like shapes. Like ordinary Bok globules, cometary globules are believed to be associated with star formation. It is named after its discoverer, the Australian astronomer Colin Stanley Gum (1924–1960). Gum had published his findings in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colin Stanley Gum
Colin Stanley Gum (4 June 1924 – 29 April 1960) was an Australian astronomer known for his cataloguing of emission nebulae and the publication of his findings. Early life and education Gum was born at Quambi Hospital in Adelaide, South Australia, son of Stanley Sturt Edgar Gum and Ivy Olive (née Storr), of Appila, South Australia. His father, a farmer who had served as a private in the Australian Imperial Force during the First World War, died before Colin's birth. Gum received his BSc honours degree from the University of Adelaide in 1949, going directly to the Mount Stromlo Observatory, based upon work conducted at which he was awarded his MSc from the University of Adelaide in 1951. He was awarded his PhD in 1955 by the Australian National University, one of the first recipients of this degree from that institution. Career Gum catalogued emission nebulae in the southern sky at the Mount Stromlo Observatory using wide field photography. Gum published his findings in 195 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gum Catalog
The Gum catalog is an astronomical catalog of 84 emission nebulae in the southern sky. It was made by the Australian astronomer Colin Stanley Gum (1924-1960) at Mount Stromlo Observatory using wide field photography. Gum published his findings in 1955 in a study entitled ''A study of diffuse southern H-alpha nebulae'' which presented a catalog of 84 nebulae or nebular complexes. Similar catalogs include the Sharpless catalog and the RCW catalog, and many of the Gum objects are repeated in these other catalogs. However, the RCW and Gum catalogs were mainly of the southern hemisphere (Mount Stromlo is in the southern hemisphere) The Gum Nebula is named for Gum, who discovered it as Gum 12; it is an emission nebula that can be found in the southern constellation A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate obj ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gamma Velorum
Gamma Velorum is a quadruple star system in the constellation Vela. This name is the Bayer designation for the star, which is Latinised from γ Velorum and abbreviated γ Vel. At a combined magnitude of +1.7, it is one of the brightest stars in the night sky, and contains by far the closest and brightest Wolf–Rayet star. It has the traditional name Suhail al Muhlif and the modern name Regor , but neither is approved by the International Astronomical Union. The γ Velorum system includes a pair of stars separated by 41″, each of which is also a spectroscopic binary system. γ2 Velorum, the brighter of the visible pair, contains the Wolf–Rayet star and a blue supergiant, while γ1 Velorum contains a blue giant and an unseen companion. Distance Gamma Velorum is close enough to have accurate parallax measurements as well as distance estimates by more indirect means. The ''Hipparcos'' parallax for γ2 implies a distance of 342 parsecs (pc). A dynamical par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gould Belt
The Gould Belt is a local, partial ring of stars in the Milky Way, about 3,000 light-years long, tilted away from the galactic plane by about 16–20 degrees. It contains many O- and B-type stars, amounting to the nearest star-forming regions of the local spiral arm, to which the Sun belongs. It has recently been largely superseded in definition by the Radcliffe wave and ''Split'' linear structures. The Belt, as formed, and traditionally defined, runs for much less than one tenth of the extent of the local circumference of the galaxy, meaning in galactic coordinates it spans a narrow range of galactic longitudes. The coalescence and/or inception of new stars which cluster within it, nearby, are dated to about 30–50 million years ago. Beyond suspected prior nebulosity of many of the younger stars, and the relative concentration of gas mentioned in the Radcliffe Wave, the factors that have led to the Gould Belt's unbroken nature and concentration are far from fully u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barnard's Loop
Barnard's Loop (catalogue designation Sh 2-276) is an emission nebula in the constellation of Orion. It is part of the Orion molecular cloud complex which also contains the dark Horsehead and bright Orion nebulae. The loop takes the form of a large arc centered approximately on the Orion Nebula. The stars within the Orion Nebula are believed to be responsible for ionizing the loop. The loop extends over about 600 arcminutes as seen from Earth, covering much of Orion. It is well seen in long-exposure photographs, although observers under very dark skies may be able to see it with the naked eye. Recent estimates place it at a distance of either 159 pc (518 light years) or 440 pc (1434 ly) giving it dimensions of either about 100 or 300 ly across respectively. It is thought to have originated in a supernova explosion about 2 million years ago, which may have also created several known runaway stars, including AE Aurigae, Mu Columbae and 53 Arietis, which are believed to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CG 4
CG 4, commonly referred to as God's Hand, is a star-forming region located in the Puppis constellation, about from Earth. It is one of several objects referred to as " cometary globules", because its shape is similar to that of a comet. It has a dense head formed of gas and dust, which is around in diameter, and an elongated faint tail around in length. , and the nearby cometary globules, generally point away from the Vela Supernova Remnant, located at the center of the Gum Nebula. Discovery In 1976, photographs from the UK Schmidt Telescope—operated by the Australian Astronomical Observatory—showed several objects resembling comets, located in the Gum Nebula, an emission nebula of the constellation. Due to their particular shape, these objects came to be known as cometary globules. Each globule has a dense, dark, ruptured head and a very long tail, with the latter pointing away from the Vela Supernova Remnant. As a part of the ESO Cosmic Gems program, the European Sout ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pocket Books
Pocket Books is a division of Simon & Schuster that primarily publishes paperback books. History Pocket Books produced the first mass-market, pocket-sized paperback books in the United States in early 1939 and revolutionized the publishing industry. The German Albatross Books had pioneered the idea of a line of color-coded paperback editions in 1931 under Kurt Enoch, and Penguin Books in Britain had refined the idea in 1935 and had one million books in print by the following year. Pocket Books was founded by Richard L. Simon, M. Lincoln ("Max") Schuster and Leon Shimkin, partners of Simon & Schuster, along with Robert de Graff. In 1944, the founding owners sold the company to Marshall Field III, owner of the ''Chicago Sun'' newspaper. Following Field's death, in 1957, Leon Shimkin, a Simon & Schuster partner, and James M. Jacobson bought Pocket Books for $5 million. Simon & Schuster acquired Pocket in 1966. Penguin's success inspired entrepreneur Robert de Graff, who partn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christopher L
Christopher is the English version of a Europe-wide name derived from the Greek name Χριστόφορος (''Christophoros'' or '' Christoforos''). The constituent parts are Χριστός (''Christós''), "Christ" or "Anointed", and φέρειν (''phérein''), "to bear"; hence the "Christ-bearer". As a given name, 'Christopher' has been in use since the 10th century. In English, Christopher may be abbreviated as "Chris", "Topher", and sometimes " Kit". It was frequently the most popular male first name in the United Kingdom, having been in the top twenty in England and Wales from the 1940s until 1995, although it has since dropped out of the top 100. The name is most common in England and not so common in Wales, Scotland, or Ireland. People with the given name Antiquity and Middle Ages * Saint Christopher (died 251), saint venerated by Catholics and Orthodox Christians * Christopher (Domestic of the Schools) (fl. 870s), Byzantine general * Christopher Lekapenos (died 931 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Star Trek
''Star Trek'' is an American science fiction media franchise created by Gene Roddenberry, which began with the eponymous 1960s television series and quickly became a worldwide pop-culture phenomenon. The franchise has expanded into various films, television series, video games, novels, and comic books. With an estimated $10.6 billion in revenue, it is one of the most recognizable and highest-grossing media franchises of all time. The franchise began with ''Star Trek: The Original Series'', which debuted in the US on September 8, 1966 and aired for three seasons on NBC. It was first broadcast on September 6, 1966 on Canada's CTV network. It followed the voyages of the crew of the starship USS ''Enterprise'', a space exploration vessel built by the United Federation of Planets in the 23rd century, on a mission "to explore strange new worlds, to seek out new life and new civilizations, to boldly go where no man has gone before". In creating ''Star Trek'', Roddenberry w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
