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10199 Chariklo
10199 Chariklo is the largest confirmed centaur (small body of the outer Solar System). It orbits the Sun between Saturn and Uranus, grazing the orbit of Uranus. On 26 March 2014, astronomers announced the discovery of two rings (nicknamed as the rivers Oiapoque and Chuí) around Chariklo by observing a stellar occultation, making it the first minor planet known to have rings. A photometric study in 2001 was unable to find a definite period of rotation. Infrared observations of Chariklo indicate the presence of water ice, which may in fact be located in its rings. Michael Brown's website lists it as possibly a dwarf planet with a measured diameter of 232 km. Discovery and naming Chariklo was discovered by James V. Scotti of the Spacewatch program on February 15, 1997. Chariklo is named after the nymph Chariclo ('), the wife of Chiron and the daughter of Apollo. A symbol derived from that for 2060 Chiron, x14px, was devised in the late 1990s by German astrologer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chariklo Symbol (bold)
10199 Chariklo is the largest confirmed Centaur (minor planet), centaur (small body of the outer Solar System). It orbits the Sun between Saturn and Uranus, list of Uranus-crossing minor planets, grazing the orbit of Uranus. On 26 March 2014, astronomers announced the discovery of two planetary ring, rings (nicknamed as the rivers Oyapock, Oiapoque and Chuí Stream, Chuí) around Chariklo by observing a stellar occultation, making it the first minor planet known to have rings. A photometric study in 2001 was unable to find a definite period of rotation. Infrared observations of Chariklo indicate the presence of water ice, which may in fact be located in its rings. Michael E. Brown, Michael Brown's website lists it as List of possible dwarf planets, possibly a dwarf planet with a measured diameter of 232 km. Discovery and naming Chariklo was discovered by James V. Scotti of the Spacewatch program on February 15, 1997. Chariklo is named after the nymph Chariclo ('), the wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asteroid Color Indices
An asteroid spectral type is assigned to asteroids based on their emission spectrum, color, and sometimes albedo. These types are thought to correspond to an asteroid's surface composition. For small bodies that are not internally differentiated, the surface and internal compositions are presumably similar, while large bodies such as Ceres and Vesta are known to have internal structure. Over the years, there has been a number of surveys that resulted in a set of different taxonomic systems such as the Tholen, SMASS and Bus–DeMeo classifications. Taxonomic systems In 1975, astronomers Clark R. Chapman, David Morrison, and Ben Zellner developed a simple taxonomic system for asteroids based on color, albedo, and spectral shape. The three categories were labelled " C" for dark carbonaceous objects, " S" for stony (silicaceous) objects, and "U" for those that did not fit into either C or S. This basic division of asteroid spectra has since been expanded and clarified.Thomas H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chiron
In Greek mythology, Chiron ( ; also Cheiron or Kheiron; ) was held to be the superlative centaur amongst his brethren since he was called the "wisest and justest of all the centaurs". Biography Chiron was notable throughout Greek mythology for his youth-nurturing nature. His personal skills tend to match those of his foster father Apollo, who taught the young centaur the art of medicine, herbs, music, archery, hunting, gymnastics and prophecy, and made him rise above his beastly nature. Chiron was known for his knowledge and skill with medicine, and thus was credited with the discovery of botany and pharmacy, the science of herbs and medicine.Pliny the Elder, ''Naturalis Historia'7.56.3/ref> Like satyrs, centaurs were notorious for being wild, lusty, overly indulgent drinkers and carousers, violent when intoxicated, and generally uncultured delinquents. Chiron, by contrast, was intelligent, civilized and kind, because he was not related directly to the other centaurs due to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nymph
A nymph ( grc, νύμφη, nýmphē, el, script=Latn, nímfi, label=Modern Greek; , ) in ancient Greek folklore is a minor female nature deity. Different from Greek goddesses, nymphs are generally regarded as personifications of nature, are typically tied to a specific place or landform, and are usually depicted as maidens. They were not necessarily immortal, but lived much longer than human beings. They are often divided into various broad subgroups, such as the Meliae (ash tree nymphs), the Dryads (oak tree nymphs), the Naiads (freshwater nymphs), the Nereids (sea nymphs), and the Oreads (mountain nymphs). Nymphs are often featured in classic works of art, literature, mythology, and fiction. Since the Middle Ages, nymphs have been sometimes popularly associated or even confused with fairies. Etymology The Greek word has the primary meaning of "young woman; bride, young wife" but is not usually associated with deities in particular. Yet the etymology of the noun remains ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Possible Dwarf Planets
The number of dwarf planets in the Solar System is unknown. Estimates have run as high as 200 in the Kuiper belt and over 10,000 in the region beyond. However, consideration of the surprisingly low densities of many large trans-Neptunian objects suggests that the number of dwarf planets may be much lower, perhaps only nine among bodies known so far. The International Astronomical Union (IAU) defines dwarf planets as being in hydrostatic equilibrium, and notes five bodies in particular: in the inner Solar System and four in the trans-Neptunian region: , , , and . Only Pluto and Ceres have been confirmed to be in hydrostatic equilibrium, due to the results of the '' New Horizons'' and ''Dawn'' missions. Eris is generally assumed to be a dwarf planet because it is similar in size to Pluto and even more massive. Haumea and Makemake were accepted as dwarf planets by the IAU for naming purposes and will keep their names if it turns out they are not dwarf planets. Smaller trans-Neptun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michael E
SS ''Michael E'' was a cargo ship that was built in 1941. She was the first British Catapult Aircraft Merchant ship: a merchant ship fitted with a rocket catapult to launch a single Hawker Hurricane fighter to defend a convoy against long-range German bombers. She was sunk on her maiden voyage by a German submarine. Description ''Michael E'' was built by William Hamilton & Co Ltd, Port Glasgow. Launched in 1941, she was completed in May of that year. She was the United Kingdom's first CAM ship, armed with an aircraft catapult on her bow to launch a Hawker Sea Hurricane. The ship was long between perpendiculars ( overall), with a beam of . She had a depth of and a draught of . She was and . She had six corrugated furnaces feeding two 225 lbf/in2 single-ended boilers with a combined heating surface of . The boilers fed a 443 NHP triple-expansion steam engine that had cylinders of , and diameter by stroke. The engine was built by David Rowan & Co Ltd, Glasgow. History ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Scientist
''New Scientist'' is a magazine covering all aspects of science and technology. Based in London, it publishes weekly English-language editions in the United Kingdom, the United States and Australia. An editorially separate organisation publishes a monthly Dutch-language edition. First published on 22 November 1956, ''New Scientist'' has been available in online form since 1996. Sold in retail outlets (paper edition) and on subscription (paper and/or online), the magazine covers news, features, reviews and commentary on science, technology and their implications. ''New Scientist'' also publishes speculative articles, ranging from the technical to the philosophical. ''New Scientist'' was acquired by Daily Mail and General Trust (DMGT) in March 2021. History Ownership The magazine was founded in 1956 by Tom Margerison, Max Raison and Nicholas Harrison as ''The New Scientist'', with Issue 1 on 22 November 1956, priced at one shilling (a twentieth of a pound in pre-decimal UK cu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minor Planet
According to the International Astronomical Union (IAU), a minor planet is an astronomical object in direct orbit around the Sun that is exclusively classified as neither a planet nor a comet. Before 2006, the IAU officially used the term ''minor planet'', but that year's meeting reclassified minor planets and comets into dwarf planets and small Solar System bodies (SSSBs).Press release, IAU 2006 General Assembly: Result of the IAU Resolution votes International Astronomical Union, August 24, 2006. Accessed May 5, 2008. Minor planets include asteroids ( |
Occultation
An occultation is an event that occurs when one object is hidden from the observer by another object that passes between them. The term is often used in astronomy, but can also refer to any situation in which an object in the foreground blocks from view (occults) an object in the background. In this general sense, occultation applies to the visual scene observed from low-flying aircraft (or computer-generated imagery) when foreground objects obscure distant objects dynamically, as the scene changes over time. If the closer body does not entirely conceal the farther one, the event is called a ''transit''. Both transit and occultation may be referred to generally as ''occlusion''; and if a shadow is cast onto the observer, it is called an eclipse. The symbol for an occultation, and especially a solar eclipse, is file:Occultation symbol.svg (U+1F775 🝵). Occultations by the Moon The term occultation is most frequently used to describe lunar occultations, those relativ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chuí Stream
The Chuí, or Chuy'', ''Stream (Portuguese: ''Arroio Chuí'' , Rioplatense Spanish: ''Arroyo Chuy'' or ), is a short stream on the Brazilian–Uruguayan border that is celebrated as Brazil's southernmost point. Geography The Chui rises in a small swamp in the sandy coastal plains of the far southern Brazilian state of Rio Grande do Sul. It runs initially southward, then turns east before flowing into the Atlantic Ocean. In its final course, the stream marks the last stretch of the Brazilian border with Uruguay. In Brazil, it lies mostly in the municipality of Santa Vitória do Palmar, with a short section in Chuí. The Uruguayan side belongs to the city of Chuy, in the department of Rocha. The Chuí spans only a few tens of kilometres long and its water volume is relatively weak. This is why it is called an ''arroio'' or ''arroyo'', which in Portuguese and Spanish means "stream", respectively. It would be unremarkable, were it not for the fact that it is known throughout B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oyapock
The Oyapock or Oiapoque (; ; ) is a long river in South America that forms most of the border between the French overseas department of French Guiana and the Brazilian state of Amapá. Course The Oyapock runs through the Guianan moist forests ecoregion. It rises in the Tumuk Humak () mountain range and flows into the Atlantic Ocean, where its estuary forms a large bay bordering on Cape Orange. The mouth of the Oyapock is the northern ''end'' of Brazil's coastline, as it is where the border between Brazil and French Guiana meets the ocean, but nearby Cape Orange, which separates the Bay of Oyapock from the Atlantic Ocean, is the northernmost ''point'' of the Brazilian coast. In Brazil, both the cape and the mouth of the Oyapock are often mistaken for the whole country's northernmost point (rather than just of its coastline), and in the past this information could even be found in geography schoolbooks. Yet the true northernmost point in Brazil is actually far inland, on M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Planetary Ring
A ring system is a disc or ring, orbiting an astronomical object, that is composed of solid material such as dust and moonlets, and is a common component of satellite systems around giant planets. A ring system around a planet is also known as a planetary ring system. The most prominent and most famous planetary rings in the Solar System are those around Saturn, but the other three giant planets (Jupiter, Uranus, and Neptune) also have ring systems. Recent evidence suggests that ring systems may also be found around other types of astronomical objects, including minor planets, moons, and brown dwarfs, and as well, the interplanetary spaces between planets such as Venus and Mercury. Ring systems of planets There are three ways that thicker planetary rings have been proposed to have formed: from material of the protoplanetary disk that was within the Roche limit of the planet and thus could not coalesce to form moons, from the debris of a moon that was disrupted by a large i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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