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Roncevaux Terra
Roncevaux Terra is the name given to the northern part of the highly reflective side of Saturn's moon Iapetus. The southern half of this side is named '' Saragossa Terra''. The other half of Iapetus, named Cassini Regio, is extremely dark. It is believed that Roncevaux Terra's colour is the underlying colour of Iapetus, while Cassini Regio was formed either by a substance that has covered up the brighter ice of the rest of the moon, or by a residue left from the sublimation of Roncevaux-type water ice. Roncevaux Terra is named after the Battle of Roncevaux Pass, subject of the French epic poem the ''Chanson de Roland ''The Song of Roland'' (french: La Chanson de Roland) is an 11th-century ''chanson de geste'' based on the Frankish military leader Roland at the Battle of Roncevaux Pass in 778 AD, during the reign of the Carolingian king Charlemagne. It is ...'', after whose characters the surface features of Iapetus are named. Notes References External links * Map of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iapetus As Seen By The Cassini Probe - 20071008
In Greek mythology, Iapetus (; ; grc, Ἰαπετός, Iapetós), also Japetus, is a Titan, the son of Uranus and Gaia and father of Atlas, Prometheus, Epimetheus, and Menoetius. He was also called the father of Buphagus and Anchiale in other sources. Iapetus was linked to Japheth (יֶפֶת) one of the sons of Noah and a progenitor of mankind in biblical accounts. The practice by early historians and biblical scholars of identifying various historical nations and ethnic groups as descendants of Japheth, together with the similarity of their names, led to a fusion of their identities, from the early modern period to the present. Mythology Iapetus ("the Piercer") is the one Titan mentioned by Homer in the ''Iliad'' as being in Tartarus with Cronus. He is a brother of Cronus, who ruled the world during the Golden Age but is now locked up in Tartarus along with Iapetus, where neither breeze nor light of the sun reaches them. Iapetus' wife is usually described as a daughter o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saturn
Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius of about nine and a half times that of Earth. It has only one-eighth the average density of Earth; however, with its larger volume, Saturn is over 95 times more massive. Saturn's interior is most likely composed of a core of iron–nickel and rock (silicon and oxygen compounds). Its core is surrounded by a deep layer of metallic hydrogen, an intermediate layer of liquid hydrogen and liquid helium, and finally, a gaseous outer layer. Saturn has a pale yellow hue due to ammonia crystals in its upper atmosphere. An electrical current within the metallic hydrogen layer is thought to give rise to Saturn's planetary magnetic field, which is weaker than Earth's, but which has a magnetic moment 580 times that of Earth due to Saturn's larger size. Saturn's magnetic field strength is around one-twentieth of Jupiter's. The outer atmosphere is g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iapetus (moon)
Iapetus () is a moon of Saturn. It is the 24th of Saturn’s 83 known moons. With an estimated diameter of 1,469 km, it is the third-largest moon of Saturn and the eleventh-largest in the Solar System. Named after the Titan Iapetus, the moon was discovered in 1671 by Giovanni Domenico Cassini. A relatively low-density body made up mostly of ice, Iapetus is home to several distinctive and unusual features, such as a striking difference in coloration between its leading hemisphere, which is dark, and its trailing hemisphere, which is bright, as well as a massive equatorial ridge running three-quarters of the way around the moon. History Discovery Iapetus was discovered by Giovanni Domenico Cassini, an Italian-born French astronomer, in October 1671. He had discovered it on the western side of Saturn and tried viewing it on the eastern side some months later, but was unsuccessful. This was also the case the following year, when he was again able to observe it on the western ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saragossa Terra
Saragossa Terra is the name given to the southern part of the highly reflective half of Saturn's moon Iapetus. It is bordered on the north by Roncevaux Terra, and on both the east and west sides by Cassini Regio. The largest named crater in Saragossa Terra is the 504-km-diameter Engelier. It partially obscures the slightly smaller crater Gerin. Both craters are named for paladins mentioned in The Song of Roland ''The Song of Roland'' (french: La Chanson de Roland) is an 11th-century '' chanson de geste'' based on the Frankish military leader Roland at the Battle of Roncevaux Pass in 778 AD, during the reign of the Carolingian king Charlemagne. It i .... References Surface features of Iapetus (moon) {{crater-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cassini Regio
Cassini Regio (adjective ''Cassinian'' ) is the enigmatic dark area that covers the leading half of Saturn's moon Iapetus. It is named after Giovanni Cassini, the discoverer of Iapetus; ' Regio' is a term used in planetary geology for a large area that is strongly differentiated in colour or albedo from its surroundings. The brighter half of Iapetus is composed of the Roncevaux Terra and the Saragossa Terra. The nature of the material that caused the extensive discoloration of Cassini Regio is not known, but it appears to be quite thin. It may be the result of cryovolcanism, a spattering of material from outer moons, or residue left by the sublimation of brighter ice. In December 2004 an image taken by the NASA ''Cassini'' probe revealed that a long ridge of high mountains runs down the centre of Cassini Regio, almost perfectly following Iapetus's equator. The origin of this extremely unusual feature is as yet unknown. ''Cassini'' completed a flyby of Iapetus in September ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Battle Of Roncevaux Pass
The Battle of Roncevaux Pass ( French and English spelling, ''Roncesvalles'' in Spanish, ''Orreaga'' in Basque) in 778 saw a large force of Basques ambush a part of Charlemagne's army in Roncevaux Pass, a high mountain pass in the Pyrenees on the present border between France and Spain, after his invasion of the Iberian Peninsula. The Basque attack was a retaliation for Charlemagne's destruction of the city walls of their capital, Pamplona. As the Franks retreated across the Pyrenees back to Francia, the rearguard of Frankish lords was cut off, stood its ground, and was wiped out. Among those killed in the battle was Roland, a Frankish commander. His death elevated him and the paladins, the foremost warriors of Charlemagne's court, into legend, becoming the quintessential role model for knights and also greatly influencing the code of chivalry in the Middle Ages. There are numerous written works about the battle, some of which change and exaggerate events. The battle is recoun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
French Literature
French literature () generally speaking, is literature written in the French language, particularly by citizens of France; it may also refer to literature written by people living in France who speak traditional languages of France other than French. Literature written in the French language, by citizens of other nations such as Belgium, Switzerland, Canada, Senegal, Tunisia, Algeria, Morocco, etc. is referred to as Francophone literature. France itself ranks first on the list of Nobel Prizes in literature by country. For centuries, French literature has been an object of national pride for French people, and it has been one of the most influential components of the literature of Europe. One of the first known examples of French literature is the Song of Roland, the first major work in a series of poems known as, " chansons de geste". The French language is a Romance language derived from Latin and heavily influenced principally by Celtic and Frankish. Beginning in the 11th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epic Poem
An epic poem, or simply an epic, is a lengthy narrative poem typically about the extraordinary deeds of extraordinary characters who, in dealings with gods or other superhuman forces, gave shape to the mortal universe for their descendants. Etymology The English word ''epic'' comes from Latin ''epicus'', which itself comes from the Ancient Greek adjective (''epikos''), from (''epos''), "word, story, poem." In ancient Greek, 'epic' could refer to all poetry in dactylic hexameter (''epea''), which included not only Homer but also the wisdom poetry of Hesiod, the utterances of the Delphic oracle, and the strange theological verses attributed to Orpheus. Later tradition, however, has restricted the term 'epic' to ''heroic epic'', as described in this article. Overview Originating before the invention of writing, primary epics, such as those of Homer, were composed by bards who used complex rhetorical and metrical schemes by which they could memorize the epic as received i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chanson De Roland
''The Song of Roland'' (french: La Chanson de Roland) is an 11th-century ''chanson de geste'' based on the Frankish military leader Roland at the Battle of Roncevaux Pass in 778 AD, during the reign of the Carolingian king Charlemagne. It is the oldest surviving major work of French literature. It exists in various manuscript versions, which testify to its enormous and enduring popularity in Medieval and Renaissance literature from the 12th to 16th centuries. The epic poem written in Vulgar Latin is the first and one of the most outstanding examples of the ''chanson de geste'', a literary form that flourished between the 11th and 16th centuries in Medieval Europe and celebrated legendary deeds. The date of composition is put in the period between 1040 AD and 1115 AD; an early version began around 1040 AD with additions and alterations made up until about 1115 AD. The final text contains about 4,000 lines of poetry. Manuscripts and dating Although set in the Carolingian era, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Planetary Nomenclature
Planetary nomenclature, like terrestrial nomenclature, is a system of uniquely identifying features on the surface of a planet or natural satellite so that the features can be easily located, described, and discussed. Since the invention of the telescope, astronomers have given names to the surface features they have discerned, especially on the Moon and Mars. To found an authority on planetary nomenclature, the International Astronomical Union (IAU) was organized in 1919 to designate and standardize names for features on Solar System bodies. How names are approved by the IAU When images are first obtained of the surface of a planet or satellite, a theme for naming features is chosen and a few important features are named, usually by members of the appropriate IAU task group (a commonly accepted planet-naming group). Later, as higher resolution images and maps become available, additional features are named at the request of investigators mapping or describing specific surfaces, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Planetary Geology
Planetary geology, alternatively known as astrogeology or exogeology, is a planetary science discipline concerned with the geology of the celestial bodies such as the planets and their moons, asteroids, comets, and meteorites. Although the geo- prefix typically indicates topics of or relating to Earth, planetary geology is named as such for historical and convenience reasons; due to the types of investigations involved, it is closely linked with Earth-based geology. These investigations are centered around the composition, structure, processes, and history of a planet. Planetary geology includes such topics as determining the properties and processes of the internal structure of the terrestrial planets, and also looks at planetary volcanism and surface processes such as impact craters, fluvial and aeolian processes. The structures and compositions of the giant planets and their moons are also examined, as is the make-up of the minor bodies of the Solar System, such as aster ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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