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M33 Galaxy
The Triangulum Galaxy is a spiral galaxy 2.73 million light-years (ly) from Earth in the constellation Triangulum. It is catalogued as Messier 33 or NGC 598. With the D25 isophotal diameter of , the Triangulum Galaxy is the third-largest member of the Local Group of galaxies, behind the Andromeda Galaxy and the Milky Way. The galaxy is the second-smallest spiral galaxy in the Local Group after the Large Magellanic Cloud, which is a Magellanic-type spiral galaxy. It is believed to be a satellite of the Andromeda Galaxy or on its rebound into the latter due to their interactions, velocities, and proximity to one another in the night sky. It also has an H II nucleus. Etymology The galaxy gets its name from the constellation Triangulum, where it can be spotted. It is sometimes informally referred to as the "Pinwheel Galaxy" by some astronomy references, in some computerized telescope software, and in some public outreach websites. However, the SIMBAD Astronomical Database ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
VST Snaps A Very Detailed View Of The Triangulum Galaxy
VST may refer to: Groups, companies, organizations * Vancouver School of Theology The Vancouver School of Theology is a Christian ecumenical divinity school located on the campus of and affiliated with the University of British Columbia. Faculty * Mari Joerstad, Dean, Professor of Hebrew Bible * Joni Sancken, Professor of H ..., a theological graduate school in British Columbia, Canada * Public Security Service (VST, ), a Lithuanian law enforcement agency * VST Industries (Vazir Sultan Tobacco Company), Hyderabad, India * VST Enterprises, a cybertech company * Towner Railway (reporting mark VST) Arts, entertainment, media * Virtual Studio Technology, Steinberg's standard for audio software plug-ins ** in particular, may refer to some versions of the Steinberg Cubase program * .vst, the file extension for Truevision Vista graphics * VST (album), ''VST'' (album), a 1978 album by VST & Company * VST & Company, a Philippine disco band * ''Star Trek: Very Short Treks'', an animate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinwheel Galaxy (other)
Pinwheel Galaxy may refer to: * Messier 101, a galaxy referred to as the Pinwheel Galaxy * Messier 83, a galaxy referred to as the Southern Pinwheel Galaxy * Triangulum Galaxy The Triangulum Galaxy is a spiral galaxy 2.73 million light-years (ly) from Earth in the constellation Triangulum. It is catalogued as Messier 33 or NGC 598. With the D25 isophotal diameter of , the Triangulum Galaxy is the third-largest me ... (Messier 33), a galaxy sometimes referred to as the Pinwheel Galaxy * Messier 99, a galaxy also referred to as the Coma Pinwheel Galaxy See also * Pinwheel nebula {{disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Messier
Charles Messier (; 26 June 1730 – 12 April 1817) was a French astronomer. He published an astronomical catalogue consisting of 110 nebulae and star clusters, which came to be known as the ''Messier objects'', referred to with the letter M and their number between 1 and 110. Messier's purpose for list of Messier objects, the catalogue was to help astronomical observers distinguish between permanent and transient astronomical event, transient visually diffuse astronomical object, objects in the sky. Biography Messier was born in Badonviller in the Lorraine region of Kingdom of France, France, in 1730, the tenth of twelve children of Françoise B. Grandblaise and Nicolas Messier, a Court usher. Six of his brothers and sisters died while young, and his father died in 1741. Charles' interest in astronomy was stimulated by the appearance of the Great Comet of 1744, great six-tailed comet in 1744 and by an annular solar eclipse visible from his hometown on 25 July ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
De Systemate Orbis Cometici, Deque Admirandis Coeli Characteribus
''De systemate orbis cometici, deque admirandis coeli characteribus'' (transl. ''Of the systematics of the world of comets, and on the admirable objects of the sky'') is a small tract (literature), tract on comets and other celestial objects by the Sicily, Sicilian astronomer Giovanni Battista Hodierna published in 1654. It contains a astronomical catalogue, catalogue of comets and other celestial objects, but had limited circulation and the work was forgotten until 1985. In this work, Hodierna expressed the belief that comets were made of a more terrestrial substance, and considered nebulae to be made up of stars (''Lux Primogenita''). Scope The first part of his work (''De systemate orbis cometici'') followed Galileo's ideas on comets. The second part (''De admirandis coeli characteribus'') consisted of four main sections. The first concerns the classification of nebulas. Hodierna classified the objects into three types according to their resolvability. ''Luminosae'', or star c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Giovanni Battista Hodierna
Giovanni Battista Hodierna, also spelled as Odierna (April 13, 1597 – April 6, 1660) was an Italian astronomer at the court of Giulio Tomasi, Duke of Palma (Palma di Montechiaro). He compiled a catalogue of comets and other celestial objects containing some 40 entries, including at least 19 real and verifiable nebulous objects that might be confused with comets. Biography Hodierna was born in Ragusa, Sicily and died in Palma di Montechiaro. While serving as a Roman Catholic priest in Ragusa, he also practised astronomy. In 1654 he published a book entitled '' De systemate orbis cometici, deque admirandis coeli characteribus'' that contained a catalogue of celestial objects and a list of double stars. The work anticipated Messier's catalogue and the double star catalogues by Christian Mayer and William Herschel, but had little impact. Messier seems not to have known of it. Hodierna was prolific in publication, and his interests spanned many disciplines. In addition to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Publications Of The Astronomical Society Of The Pacific
''Publications of the Astronomical Society of the Pacific'' (often abbreviated as ''PASP'' in references and literature) is a monthly peer-reviewed scientific journal managed by the Astronomical Society of the Pacific. It publishes research and review papers, instrumentation papers and dissertation summaries in the fields of astronomy and astrophysics. Between 1999 and 2016 it was published by the University of Chicago Press and since 2016, it has been published by IOP Publishing. The current editor-in-chief is Jeff Mangum of the National Radio Astronomy Observatory. ''PASP'' has been published monthly since 1899, and along with ''The Astrophysical Journal'', ''The Astronomical Journal'', ''Astronomy and Astrophysics'', and the ''Monthly Notices of the Royal Astronomical Society'', is one of the primary journals for the publication of astronomical research. See also * ''List of astronomy journals'' References Astronomy journals IOP Publishing academic journals Publications ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monthly Notices Of The Royal Astronomical Society
''Monthly Notices of the Royal Astronomical Society'' (MNRAS) is a peer-reviewed scientific journal in astronomy, astrophysics and related fields. It publishes original research in two formats: papers (of any length) and letters (limited to five pages). MNRAS publishes more articles per year than any other astronomy journal. The learned society journal has been in continuous existence since 1827 and became online only in 2020. It operates as a partnership between the Royal Astronomical Society (RAS), who select and peer-review the contents, and Oxford University Press (OUP), who publish and market the journal. Despite its name, MNRAS is no longer monthly, nor does it carry the notices of the RAS. In 2024 MNRAS became a purely gold open access journal. History The first issue of MNRAS was published on 9 February 1827 as ''Monthly Notices of the Astronomical Society of London'' and it has been in continuous publication ever since. It took its current name from the second vo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andrew Crumey
Andrew Crumey (born 1961) is a novelist and former literary editor of the Edinburgh newspaper ''Scotland on Sunday''. His works of literary fiction incorporate elements of speculative fiction, historical fiction, philosophical fiction and Menippean satire. Brian Stableford has called them "philosophical fantasies". The Spanish newspaper El Mundo called Crumey "one of the most interesting and original European authors of recent years." Life and career Crumey was born in Glasgow, Scotland, and grew up in Kirkintilloch. He graduated with First Class Honours from the University of St Andrews and holds a PhD in theoretical physics from Imperial College, London. His thesis was on integrable systems and Kac-Moody algebras, supervised by David Olive. Crumey's first novel, '' Music, in a Foreign Language'', won the Saltire Society First Book Award in 1994. Its theme of alternate history was inspired by the many-worlds interpretation of quantum mechanics. His second novel '' Pfitz' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bortle Dark-Sky Scale
The Bortle dark-sky scale (usually referred to as simply the Bortle scale) is a nine-level numeric scale that measures the night sky's sky brightness, brightness of a particular location. It quantifies the astronomy, astronomical observability of celestial objects and the interference caused by light pollution. Amateur astronomer John E. Bortle created the scale and published it in the February 2001 edition of ''Sky & Telescope'' magazine to help skywatchers evaluate the darkness of an observing site, and secondarily, to compare the darkness of observing sites. The scale ranges from Class 1, the darkest skies available on Earth, through to Class 9, inner-city skies. It gives several criteria for each level beyond naked-eye limiting magnitude (NELM). The accuracy and utility of the scale have been questioned in 2014 research. The table summarizes Bortle's descriptions of the classes. For some classes, there can be drastic differences from one class to the next, e.g, Bortle 4 to 5, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Averted Vision
Averted vision is a technique for viewing faint objects which uses peripheral vision. It involves not looking directly at the object, but looking a little off to the side, while continuing to concentrate on the object. This subject is discussed in the popular astronomy literature but only a few rigorous studies have quantified the effect. There is some evidence that the technique has been known since ancient times, as it seems to have been reported by Aristotle while observing the star cluster now known as M41. This technique of being able to see very dim lights over a long distance has also been passed down over hundreds of generations of sailors whose duties included standing lookout watches, making one better able to spot dim lights from other ships or shore locations at night. The technique has also been used in military training. The same technique can be employed with or without a telescope (looking to the side with the naked eye or looking towards the edge of the telescope ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naked Eye
Naked eye, also called bare eye or unaided eye, is the practice of engaging in visual perception unaided by a magnification, magnifying, Optical telescope#Light-gathering power, light-collecting optical instrument, such as a telescope or microscope, or eye protection. In astronomy, the naked eye may be used to observe celestial events and astronomical object, objects visible without equipment, such as conjunction (astronomy), conjunctions, passing comets, meteor showers, and the brightest asteroids, including 4 Vesta. Sky lore and various tests demonstrate an impressive variety of phenomena visible to the unaided eye. Basic properties Some basic properties of the human eye are: *Quick autofocus from distances of 25 cm (young people) to 50 cm (most people 50 years and older) to infinity. *Angular resolution: about 1 arcminute, approximately 0.017° or 0.0003 radians, which corresponds to 0.3 m at a 1 km distance. *Field of view (FOV): simultaneous visual ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light Pollution
Light pollution is the presence of any unwanted, inappropriate, or excessive artificial Visible spectrum, lighting. In a descriptive sense, the term ''light pollution'' refers to the effects of any poorly implemented lighting sources, during the day or night. Light pollution can be understood not only as a phenomenon resulting from a specific source or kind of pollution, but also as a contributor to the wider, collective impact of various sources of pollution. Although this type of pollution can exist throughout the day, its effects are magnified during the night with the contrast of the sky's darkness. It has been estimated that 83% of the world's people live under light-polluted skies and that 23% of the world's land area is affected by skyglow. The area affected by artificial illumination continues to increase. A major side effect of urbanization, light pollution is blamed for compromising health, disrupting ecosystems, and spoiling aesthetic environments. Studies show that ur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
