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Suttungr (moon)
Suttungr , or Saturn XXIII, is a natural satellite of Saturn. It was discovered by Brett J. Gladman, et al. in 2000, and given the temporary designation S/2000 S 12. It was named for Suttungr in Norse mythology, a Jötunn or giant who once owned the mead of poetry. Suttungr is about 7 kilometres in diameter, and orbits Saturn at an average distance of 19,667 Mm in 1029.703 days. It may have formed from debris knocked off Phoebe (moon), Phoebe. The Suttung orbit is retrograde motion, retrograde, at an inclination of 174° to the ecliptic (151° to Saturn's equator) and with an eccentricity (orbit), eccentricity of 0.131. Its rotation period is hours, and like Albiorix (moon), Albiorix its light curve exhibits two minima at certain angles, and three minima at others. Having a similar gray color and orbit as Thrymr (moon), Thrymr, the two moons may be members of the same dynamical family. Its name was announced in its oblique case, oblique form Suttung iIAU Circular ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eccentricity (orbit)
In astrodynamics, the orbital eccentricity of an astronomical object is a dimensionless parameter that determines the amount by which its orbit around another body deviates from a perfect circle. A value of 0 is a circular orbit, values between 0 and 1 form an elliptic orbit, 1 is a parabolic escape orbit (or capture orbit), and greater than 1 is a hyperbola. The term derives its name from the parameters of conic sections, as every Kepler orbit is a conic section. It is normally used for the isolated two-body problem, but extensions exist for objects following a rosette orbit through the Galaxy. Definition In a two-body problem with inverse-square-law force, every orbit is a Kepler orbit. The eccentricity of this Kepler orbit is a non-negative number that defines its shape. The eccentricity may take the following values: * Circular orbit: * Elliptic orbit: * Parabolic trajectory: * Hyperbolic trajectory: The eccentricity is given by e = \sqrt where is the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discoveries By Brett J
Discoveries may refer to: Media Film and television * ''Discoveries'' (film), a 1939 British film * ''Discoveries'' (TV series), a Canadian youth science television series * "Discoveries", a Series D episode of the television series ''QI'' (2006) * "Discoveries" (''Hotel Portofino''), a 2022 TV episode Literature * ''Discoveries'' (Robertson Davies), a 2002 book by Robertson Davies * ''Abrams Discoveries'', a series of illustrated non-fiction books published by Harry N. Abrams * ''Discoveries'', a work by William Butler Yeats, written in 1907 * ''Discoveries'', a magazine published by Cedars-Sinai Medical Center Music * ''Discoveries'' (Cannonball Adderley album), 1955 * ''Discoveries'' (Josh Nelson album), 2011 * ''Discoveries'' (Northlane album), 2011 Other uses * Discoveries (horse), a racehorse See also * Age of Discoveries * Discovery (other) * Explorations (other) Exploration is the process of discovery. Exploration or explorations may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irregular Satellites
In astronomy, an irregular moon, irregular satellite, or irregular natural satellite is a natural satellite following an orbit that is irregular in some of the following ways: Distant; orbital inclination, inclined; orbital eccentricity, highly elliptical; Retrograde and prograde motion, retrograde. They have often been Asteroid capture, captured by their parent planet, unlike regular satellites formed in orbit around them. Irregular moons have a stable orbit, unlike temporary satellites which often have similarly irregular orbits but will eventually depart. The term does not refer to shape; Triton (moon), Triton, for example, is a planetary-mass moon, round moon but is considered irregular due to its orbit and origins. , 356 irregular moons are known, orbiting all four of the outer planets (Jupiter, Saturn, Uranus, and Neptune). The largest of each planet are Himalia (moon), Himalia of Jupiter, Phoebe (moon), Phoebe of Saturn, Sycorax (moon), Sycorax of Uranus, and Triton (moon), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moons Of Saturn
The moons of Saturn are numerous and diverse, ranging from tiny moonlets only tens of meters across to the enormous Titan (moon), Titan, which is larger than the planet Mercury (planet), Mercury. There are 274 natural satellite, moons with confirmed orbits, the most of any planet in the Solar System. This number does not include the many thousands of moonlets embedded within Rings of Saturn, Saturn's dense rings, nor hundreds of possible kilometer-sized distant moons that have been observed on single occasions. Three moons are particularly notable. Titan is the second-List of natural satellites, largest moon in the Solar System (after Jupiter's Ganymede (moon), Ganymede), with a Atmosphere of Titan#Composition, nitrogen-rich Earth-like Atmosphere of Titan, atmosphere and a landscape featuring river networks and lakes of Titan, hydrocarbon lakes. Enceladus emits jets of ice from its south-polar region and is covered in a deep layer of snow. Iapetus (moon), Iapetus has contrasting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nominative Case
In grammar, the nominative case ( abbreviated ), subjective case, straight case, or upright case is one of the grammatical cases of a noun or other part of speech, which generally marks the subject of a verb, or (in Latin and formal variants of English) a predicative nominal or adjective, as opposed to its object, or other verb arguments. Generally, the noun "that is doing something" is in the nominative, and the nominative is often the form listed in dictionaries. Etymology The English word ''nominative'' comes from Latin ''cāsus nominātīvus'' "case for naming", which was translated from Ancient Greek ὀνομαστικὴ πτῶσις, ''onomastikḗ ptôsis'' "inflection for naming", from ''onomázō'' "call by name", from ''ónoma'' "name". Dionysius Thrax in his The Art of Grammar refers to it as ''orthḗ'' or ''eutheîa'' "straight", in contrast to the oblique case, oblique or "bent" cases. Characteristics The reference form (more technically, the ''lea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Working Group On Planetary System Nomenclature
The International Astronomical Union (IAU; , UAI) is an international non-governmental organization (INGO) with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreach, education, and development through global cooperation. It was founded on 28 July 1919 in Brussels, Belgium and is based in Paris, France. The IAU is composed of individual members, who include both professional astronomers and junior scientists, and national members, such as professional associations, national societies, or academic institutions. Individual members are organised into divisions, committees, and working groups centered on particular subdisciplines, subjects, or initiatives. the Union had 85 national members and 12,734 individual members, spanning 90 countries and territories. Among the key activities of the IAU is serving as a forum for scientific conferences. It sponsors nine annual symposia and holds a triannual General Assembly that sets policy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oblique Case
In grammar, an oblique ( abbreviated ; from ) or objective case ( abbr. ) is a nominal case other than the nominative case and, sometimes, the vocative. A noun or pronoun in the oblique case can generally appear in any role except as subject, for which the nominative case is used. The term ''objective case'' is generally preferred by modern English grammarians, where it supplanted Old English's dative and accusative. When the two terms are contrasted, they differ in the ability of a word in the oblique case to function as a possessive attributive; whether English has an oblique rather than an objective case then depends on how " proper" or widespread one considers the dialects where such usage is employed. An oblique case often contrasts with an unmarked case, as in English oblique ''him'' and ''them'' versus nominative ''he'' and ''they''. However, the term ''oblique'' is also used for languages without a nominative case, such as ergative–absolutive languages; in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The University Of Arizona Press
The University of Arizona Press, a publishing house founded in 1959 as a department of the University of Arizona, is a nonprofit publisher of scholarly and regional books. As a delegate of the University of Arizona to the larger world, the Press publishes the work of scholars wherever they may be, concentrating upon scholarship that reflects the special strengths of the University of Arizona, Arizona State University, and Northern Arizona University. The Press publishes about fifty books annually and has some 1,400 books in print. These include scholarly titles in American Indian studies, anthropology, archaeology, environmental studies, geography, Chicano studies, history, Latin American studies, and the space sciences. The UA Press has award-winning books in more than 30 subject areas. The UA Press also publishes general interest books on Arizona and the Southwest borderlands. In addition, the Press publishes books of personal essays, such as Nancy Mairs's ''Plaintext'' and tw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thrymr (moon)
Thrymr ( ), or Saturn XXX, is a natural satellite of Saturn. It was discovered by Gladman and colleagues in 2000, and given the temporary designation S/2000 S 7. Its name comes from Norse mythology, where Thrymr is a Jotun. Thrymr is about 8 kilometres in diameter, and orbits Saturn at an average distance of 20,810 Mm in 1120.809 days. It may have formed from debris knocked off Phoebe. The Thrymian orbit is retrograde, at an inclination of 175° to the ecliptic (151° to Saturn's equator) and with an eccentricity of 0.453. Like Ijiraq and Kiviuq, Thrymr's orbit overlaps strongly with Phoebe's such that it is likely to collide with it in the future. Its rotation period is hours, the slowest among the retrograde moons measured by ''Cassini–Huygens'' and the second-slowest after Tarqeq. Having two maxima and two minima in its light curve, it may therefore be a contact binary, although this is less likely than for Kiviuq and Bestla. The surface of Thrymr is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light Curve
In astronomy, a light curve is a graph (discrete mathematics), graph of the Radiance, light intensity of a celestial object or region as a function of time, typically with the magnitude (astronomy), magnitude of light received on the ''y''-axis and with time on the ''x''-axis. The light is usually in a particular frequency interval or frequency band, band. Light curves can be periodic, as in the case of eclipsing binary, eclipsing binaries, Cepheid variables, other periodic variables, and Methods of detecting extrasolar planets#Transit photometry, transiting extrasolar planets; or aperiodic, like the light curve of a nova, cataclysmic variable star, supernova, gravitational microlensing, microlensing event, or binary as observed during occultation events. The study of a light curve and other observations can yield considerable information about the physical process that produces such a light curve, or constrain the physical theories about it. Variable stars Graphs of the ap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
