In Greek mythology, Iapetus (/ aɪˈæpɪtəs /) (also Japetus (Ancient Greek: Ἰαπετός Iapetos)) was 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.
- Physical characteristics
Iapetus is the third-largest natural satellite of Saturn, eleventh-largest in the Solar System, and the largest body in the Solar System known not to be in hydrostatic equilibrium. Discoveries by the Cassini mission in 2007 revealed several unusual features, such as a massive equatorial ridge running three-quarters of the way around the moon.
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 side, but not the eastern side. Cassini finally observed Iapetus on the eastern side in 1705 with the help of an improved telescope, finding it two magnitudes dimmer o
Iapetus is named after the Titan Iapetus from Greek mythology. The name was suggested by John Herschel in his 1847 publication Results of Astronomical Observations made at the Cape of Good Hope, in which he advocated naming the moons of Saturn after the Titans, brothers and sisters of the Titan Cronus. The name has a largely obsolete variant, Japetus /ˈdʒæpɪtəs/, with an adjectival form Japetian. These occur because there was no distinction between the letters ⟨i⟩ and ⟨j⟩ in ...
The orbit of Iapetus is somewhat unusual. Although it is Saturn's third-largest moon, it orbits much farther from Saturn than the next closest major moon, Titan. It has also the most inclined orbital plane of the regular satellites; only the irregular outer satellites like Phoebe have more inclined orbits. Because of this distant, inclined orbit, Iapetus is the only large moon from which the rings of Saturn would be clearly visible; from the other inner moons, the rings would be edge-on and diff
The low density of Iapetus indicates that it is mostly composed of ice, with only a small amount of rocky materials.
The moons of Saturn are typically thought to have formed through co-accretion, a similar process to that believed to have formed the planets in the Solar System. As the young gas giants formed, they were surrounded by discs of material that gradually coalesced into moons. However, a proposed model on the formation of Titan suggests that Titan was instead formed in a series of giant impacts between pre-existing moons. Iapetus and Rhea are thought to have formed from part of the debris of these co
- Research history
- Geodynamic history
The Iapetus Ocean was an ocean that existed in the late Neoproterozoic and early Paleozoic eras of the geologic timescale. The Iapetus Ocean was situated in the southern hemisphere, between the paleocontinents of Laurentia, Baltica and Avalonia. The ocean disappeared with the Acadian, Caledonian and Taconic orogenies, when these three continents joined to form one big landmass called Euramerica. The "southern" Iapetus Ocean has been proposed to have closed with the Famatinian and Taconic orogeni
At the start of the 20th century, American paleontologist Charles Walcott noticed differences in early Paleozoic benthic trilobites of Laurentia, as found in Scotland and western Newfoundland and those of Baltica, as found in the southern parts of the British Isles and eastern Newfoundland. Geologists of the early 20th century presumed that a large trough, a so-called geosyncline, had existed between Scotland and England in the early Paleozoic, keeping both sides separated. With the development
In many spots in Scandinavia basaltic dikes are found with ages between 670 and 650 million years. These are interpreted as evidence that by that time, rifting had started that would form the Iapetus Ocean. In Newfoundland and Labrador, the Long Range dikes are also thought to ha
Southwest of the Iapetus, a volcanic island arc evolved from the early Cambrian onward. This volcanic arc was formed above a subduction zone where the oceanic lithosphere of the Iapetus Ocean subducted southward under other oceanic lithosphere. From Cambrian times the western Iap
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Iapetus is a large moon of Saturn. It was discovered by Giovanni Domenico Cassini in 1671. Iapetus is unusual: one side is very bright and the other side is very dark. This is because one half of the moon is covered in ice and the other side is coated in black, dusty carbon deposits.
Iapetus Ocean From Simple English Wikipedia, the free encyclopedia Reconstruction of how the Iapetus Ocean and surrounding continents might have been arranged during the late Ediacaran period Position of the continents after the Caledonian orogeny (Devonian to Permian times).
The Iapetus Ocean was an ancient ocean which existed in the Southern Hemisphere approximately 600 million years ago and was bordered by several paleocontinents: Laurentia, Ganderia, Carolinia, Avalonia, and Baltica.
From Wikipedia, the free encyclopedia Saturn's moon Iapetus has a long, 20-kilometer-high ridge running along most of its equator. It was discovered by the Cassini probe in 2004. The ridge's origin is unknown.
- 20 km
- 1,300 km
Iapetus, psáno též Japetus (pojmenován po starořecké mytické postavě Iapetovi), astronomické definitivní označení Saturn VIII, je přirozený satelit planety Saturn o průměru 1436 km, kterou obíhá mezi drahami Titanu a Phoebe ve vzdálenosti 3,56 milionu km. Objevil ho 25. října 1671 Giovanni Domenico Cassini.
Iapetus (phát âm /aɪˈæpɨtəs/) đôi khi được viết là Japetus (phiên âm là /ˈdʒæpɨtəs/) là vệ tinh lớn thứ ba của Sao Thổ (sau Titan và Rhea) và là vệ tinh lớn thứ 11 trong hệ Mặt trời. Iapetus được nhà thiên văn học Giovanni Domenico Cassini phát hiện vào năm 1671.