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A planet is a large, rounded astronomical body that is neither a star nor its remnant. The best available theory of planet formation is the nebular hypothesis, which posits that an interstellar cloud collapses out of a nebula to create a young protostar orbited by a protoplanetary disk. Planets grow in this disk by the gradual accumulation of material driven by gravity, a process called accretion. The Solar System has at least eight planets: the terrestrial planets Mercury, Venus, Earth and Mars, and the giant planets Jupiter, Saturn, Uranus and Neptune. These planets each rotate around an axis tilted with respect to its orbital pole. All planets of the Solar System other than Mercury possess a considerable atmosphere, and some share such features as ice caps, seasons, volcanism, hurricanes, tectonics, and even hydrology. Apart from Venus and Mars, the Solar System planets generate magnetic fields, and all except Venus and Mercury have natural satellites. The giant planets bear planetary rings, the most prominent being those of Saturn.
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.
Pes cavus, also known as high arch, is a human foot type in which the sole of the foot is distinctly hollow when bearing weight. That is, there is a fixed plantar flexion of the foot. A high arch is the opposite of a flat foot and is somewhat less common.
Asgard is the second largest multi-ringed basin on Jupiter's moon Callisto. It is named after Asgard, the realm of the gods in Norse mythology. The central part of Asgard is dominated by the domed Doh impact crater.
Narvi or Saturn XXXI is a natural satellite of Saturn. It was discovered by a team of astronomers led by Scott S. Sheppard in 2003, and given the temporary designation S/2003 S 1.
This is a list of minor planets which have been officially named by the Working Group for Small Bodies Nomenclature (WGSBN) of the International Astronomical Union (IAU). The list consists of partial pages, each covering a number range of 1,000 bodies citing the source after each minor planet was named for. An overview of all existing partial pages is given in section § Index.
Shukra is a Sanskrit word that means "clear" or "bright". It also has other meanings, such as the name of an ancient lineage of sages who counselled the asuras in Vedic mythology. In medieval mythology and Hindu astrology, the term refers to the planet Venus, one of the Navagrahas.
The near side of the Moon is the lunar hemisphere that always faces towards Earth, opposite to the far side. Only one side of the Moon is visible from Earth because the Moon rotates on its axis at the same rate that the Moon orbits the Earth—a situation known as tidal locking.
Çavuş, also anglicized Chaush and Chiaus, Arabic 'shawish, شاويش', was an Ottoman title used for two separate soldier professions, both acting as messengers although differing in levels. It was a rank below agha and kethüda, in units such as the Janissaries and Sipahi, and was also a term for members of the specialized unit of çavuşān consisting of combined cavalry and infantry serving the Imperial Council. The leaders of the council's çavuş were titled çavuşbaşı / چاوش باشی. The çavuşbaşı was an assistant to the Grand Vizier, dealing with security matters, accompanying ambassadors visiting the Grand Vizier, and also carried out the first examination of petitions submitted to the council, and led council meetings when the Grand Vizier was not present. The title has its origin in Uyghur use, where it was the title of ambassadors, and then entered Seljuq use for Byzantine imperial messengers, and Persian and Arabic use for various court attendants.
Zonza is a commune in the Corse-du-Sud department of France on the island of Corsica.
Manastır Mosque is a former Eastern Orthodox church converted into a mosque by the Ottomans. Neither archeological excavations nor medieval sources have made it possible to find a satisfactory answer as to its original dedication as a church. It is however possible that the small building was part of the Byzantine monastery dedicated to the Holy Martyrs Menodora, Metrodora, and Nymphodora, or an annex of the nunnery of Kyra Martha. The edifice is a minor example of Byzantine architecture in Constantinople, and is important for historical reasons.
İncili Çavuş or Mustafa Çavuş was a figure of comic wisdom during the Ottoman era. He may possibly have been a real person.
The Cavu or rivière de Cavu, is a short river in the Corse-du-Sud department of Corsica which discharges into the Tyrrhenian Sea, and the Mediterranean Sea. In 2014 the Cavu became the first place of re-emerging schistosomiasis in Europe. As of 2016 120 people have become infected after bathing in it.
Hyperboreae Undae is one of the largest and densest dune fields of Planum Boreum, the Martian North Pole. It is named after one of the classical albedo features on Mars. Its name was officially approved by IAU in 1988. It extends from latitude 77.12°N to 82.8°N and from longitude 302.92°E to 316.02°E. Its centre is at latitude 79.96°N, longitude 49.49°W, and has a diameter of 463.65 kilometres (288.10 mi).
References
- ↑ Dictionary of Mythology, Folklore, and Symbols (in 3 vols.), by Gertrude Jobes; Scarecrow Press, Inc., New York, 1962.
- ↑ Planetary Names: Cavus, cavi: Kulilu Cavus on Triton. Gazetteer of Planetary Nomenclature. Retrieved 16 August 2013
