|
Bebhionn (moon)
Bebhionn (), also known as Saturn XXXVII, is a small, irregular natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, and Brian G. Marsden on 4 May 2005 from observations taken between 12 December 2004 and 9 March 2005. Bebhionn is about 6 kilometres in diameter and orbits Saturn at an average distance of 16,898 Mm in 820.130 days at an inclination of 41° to the ecliptic (18° to Saturn's equator) and with an eccentricity of 0.333. The rotation period of Bebhionn was measured at hours by the ISS camera of the Cassini spacecraft.T. Denk, S. Mottola, ''et al.'' (2011): Rotation Periods of Irregular Satellites of SaturnEPSC/DPS conference 2011 Nantes (France)abstract 1452 Bebhionn's light curve reflects an elongated shape with large variations in brightness, making it a leading candidate for a contact binary or binary moon. Name The moon was named in April 2007 after Béibhinn (Béḃinn), an early Irish goddess of birt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cassini (spacecraft)
Cassini may refer to: People * Cassini (surname) * Oleg Cassini (1913-2006), American fashion designer :Cassini family: * Giovanni Domenico Cassini (1625–1712), Italian mathematician, astronomer, engineer, and astrologer * Jacques Cassini (1677–1756), French astronomer, son of Giovanni Domenico Cassini * César-François Cassini de Thury (1714–1784), French astronomer and cartographer, son of Jacques Cassini * Jean-Dominique, comte de Cassini (1748–1845), French astronomer, son of César-François Cassini de Thury * Alexandre Henri Gabriel de Cassini (1781–1832), French botanist and naturalist, son of Jean-Dominique de Cassini Planetary science * Cassini's laws on the motion of the Moon * Cassini Division, a gap in the rings of Saturn * ''Cassini–Huygens'', the space mission to examine Saturn and its moons, of which the ''Cassini'' orbiter was a part * Cassini (Martian crater) * Cassini (lunar crater) * 24101 Cassini, an asteroid * 24102 Jacquescassini, another aster ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light Curve
In astronomy, a light curve is a graph of light intensity of a celestial object or region as a function of time, typically with the 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 band. Light curves can be periodic, as in the case of eclipsing binaries, Cepheid variables, other periodic variables, and transiting extrasolar planets, or aperiodic, like the light curve of a nova, a cataclysmic variable star, a supernova or a microlensing event or binary as observed during occultation events. The study of the light curve, together with other observations, can yield considerable information about the physical process that produces it or constrain the physical theories about it. Variable stars Graphs of the apparent magnitude of a variable star over time are commonly used to visualise and analyse their behaviour. Although the categorisation of variable star types is increasingly done from their s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discoveries By Scott S
Discoveries may refer to: Music * ''Discoveries'' (Cannonball Adderley album), 1955 * ''Discoveries'' (Josh Nelson album), 2011 * ''Discoveries'' (Northlane album), 2011 Other uses * ''Discoveries'' (film), a 1939 British film * Discoveries (horse), a racehorse * ''Discoveries'' (Robertson Davies), a 2002 book by Robertson Davies * ''Discoveries'' (TV series), a Canadian youth science television series which aired on CBC Television in 1957 * ''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 See also * Age of Discoveries * Discovery (other) Discovery may refer to: * Discovery (observation), observing or finding something unknown * Discovery (fiction), a character's learning something unknown * Discovery (law), a process in courts of law relating to evidence Discovery, The Discov ... [...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 a distant, inclined, and often eccentric and retrograde orbit. They have been captured by their parent planet, unlike regular satellites, which 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 as Triton is a round moon, but is considered irregular due to its orbit. As of December 2022, 149 irregular moons are known, orbiting all four of the outer planets (Jupiter, Saturn, Uranus and Neptune). The largest of each planet are Himalia of Jupiter, Phoebe of Saturn, Sycorax of Uranus, and Triton of Neptune. It is currently thought that the irregular satellites were captured from heliocentric orbits near their current locations, shortly after the formation of their parent planet. An alternative theory, that they originated ... [...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 enormous Titan (moon), Titan, which is larger than the planet Mercury (planet), Mercury. Saturn has 83 natural satellite, moons with confirmed orbits that are not embedded in its Rings of Saturn, rings—of which only 13 have diameters greater than 50 kilometers—as well as dense rings that contain millions of embedded moonlets and innumerable smaller ring particles. Seven Saturnian moons are large enough to have collapsed into a relaxed, ellipsoidal shape, though only one or two of those, Titan and possibly Rhea (moon), Rhea, are currently in hydrostatic equilibrium. Particularly notable among Saturn's moons are Titan, 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 dry river networks and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gallic Group
The Gallic group is a dynamical grouping of the prograde irregular satellites of Saturn following similar orbits. Their semi-major axes range between 16 and 19 Gm, their inclinations between 35° and 40°, and their eccentricities around 0.53. The International Astronomical Union (IAU) reserves names taken from Gallic mythology for these moons. Similar mean orbital elements led the discoverers to postulate a common origin for the group in a breakup of a larger body. The group was later found to be physically homogeneous, all satellites displaying ''light-red'' colour ( colour indices B − V = 0.91 and V − R = 0.48) and similar infrared indices Remarkably, recent observations revealed that the largest member of the group, Albiorix, displays actually two different colours: one compatible with Erriapus and Tarvos, and another less red. Instead of the common progenitor, it was postulated that Tarvos and Erriapus could be fragments of Albiorix, leaving a large, less red crate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schwa
In linguistics, specifically phonetics and phonology, schwa (, rarely or ; sometimes spelled shwa) is a vowel sound denoted by the IPA symbol , placed in the central position of the vowel chart. In English and some other languages, it represents the mid central vowel sound (rounded or unrounded), produced when the lips, tongue, and jaw are completely relaxed, such as the vowel sound of the in the English word ''about''. In English, some long-established phonetic transcription systems assert that the mid central vowel as an unstressed vowel and transcribed with schwa (ə) is always a different vowel sound from the open-mid back unrounded vowel as a stressed vowel and transcribed with turned v ( ʌ), although they may recognize allophony between the pair. As Geoff Lindsey explains, within these systems, it is said that "schwa is never stressed"; but other authorities (including Lindsey himself) recognize that in some varieties of English, such as General American Engli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vowel Reduction
In phonetics, vowel reduction is any of various changes in the acoustic ''quality'' of vowels as a result of changes in stress, sonority, duration, loudness, articulation, or position in the word (e.g. for the Creek language The Muscogee language (Muskogee, ''Mvskoke'' in Muscogee), also known as Creek, is a Muskogean language spoken by Muscogee (Creek) and Seminole people, primarily in the US states of Oklahoma and Florida. Along with Mikasuki, when it is spoken ...), and which are perceived as "weakening". It most often makes the vowels shorter as well. Vowels which have undergone vowel reduction may be called ''reduced'' or ''weak''. In contrast, an unreduced vowel may be described as ''full'' or ''strong''. Transcription There are several ways to distinguish full and reduced vowels in transcription. Some English dictionaries mark full vowels for secondary stress, so that e.g. is a full unstressed vowel while is a reduced, unstressed ''schwi''. Or the vowel quality ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irish Phonology
Irish phonology varies from Irish language#Dialects, dialect to dialect; there is no standard language, standard pronunciation of Irish language, Irish. Therefore, this article focuses on phenomena shared by most or all dialects, and on the major differences among the dialects. Detailed discussion of the dialects can be found in the specific articles: Ulster Irish, Connacht Irish, and Munster Irish. Irish phonology has been studied as a discipline since the late 19th century, with numerous researchers publishing descriptive linguistics, descriptive accounts of dialects from all regions where the language is spoken. More recently, Irish phonology has been the focus of theoretical linguists. One of the most important aspects of Irish phonology is that almost all consonants (but ) come in pairs, a "broad" and a "slender" pronunciation. Broad consonants are either velarized (◌ˠ; back of tongue is pulled back and slightly up in the direction of the soft palate during articulati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irish Initial Mutations
Irish, like all modern Celtic languages, is characterized by its initial consonant mutations. These mutations affect the initial consonant of a word under specific morphological and syntactic conditions. The mutations are an important tool in understanding the relationship between two words and can differentiate various meanings. Irish, like Manx and colloquial Scottish Gaelic, uses two mutations on consonants: lenition ( ʃeː.vʲuː and eclipsis ( ʊ.ɾˠuː (the alternative names, ''aspiration'' for lenition and ''nasalisation'' for eclipsis, are also used, but those terms are misleading). Originally these mutations were phonologically governed external sandhi effects: lenition was caused by a consonant being between two vowels, and eclipsis when a nasal preceded an obstruent, including at the beginning of a word. There are also two mutations, t- prothesis and h-prothesis, found on vowel-initial words. See Irish phonology for a discussion of the symbols used on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irish Orthography
Irish orthography is very etymological which allows the same written form to represent all dialects of Irish and remain regular. For example, ("head") may be read in Mayo and Ulster, in Galway, or in Munster. A spelling reform in the mid-20th century eliminated inter-dialectal silent letters and lead to , the modern standard written form used by the Government of Ireland, which regulates both spelling and grammar. Some words may have dialectal pronunciations not reflected by their standard spelling, some may have dialectal spellings to reflect this. The IPA transcriptions of examples on this page are in Connacht Irish. Grapheme to Phoneme correspondance tables on this page follow the layout shown below, on this layout stands for Mayo and Ulster Irish, for southern Connacht Irish and for Munster Irish. Alphabet Latin script has been the writing system used to write Irish since the 8th century, when it replaced Ogham which was used to write Primitive Irish and Old Iri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irish Mythology
Irish mythology is the body of myths native to the island of Ireland. It was originally passed down orally in the prehistoric era, being part of ancient Celtic religion. Many myths were later written down in the early medieval era by Christian scribes, who modified and Christianized them to some extent. This body of myths is the largest and best preserved of all the branches of Celtic mythology. The tales and themes continued to be developed over time, and the oral tradition continued in Irish folklore alongside the written tradition, but the main themes and characters remained largely consistent. The myths are conventionally grouped into ' cycles'. The Mythological Cycle consists of tales and poems about the god-like Túatha Dé Danann, who are based on Ireland's pagan deities, and other mythical races like the Fomorians. Important works in the cycle are the ''Lebor Gabála Érenn'' ("Book of Invasions"), a legendary history of Ireland, the ''Cath Maige Tuired'' ("Ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Irish Mythology")