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Magellanic Clouds
The Magellanic Clouds (''Magellanic system'' or ''Nubeculae Magellani'') are two irregular dwarf galaxies in the southern celestial hemisphere. Orbiting the Milky Way galaxy, these satellite galaxies are members of the Local Group. Because both show signs of a bar structure, they are often reclassified as Magellanic spiral galaxies. The two galaxies are: * Large Magellanic Cloud (LMC), approximately 163,000 light-years away * Small Magellanic Cloud (SMC), approximately 206,000 light years away Magellanic clouds are visible to the unaided eye in the Southern Hemisphere but they cannot be observed from the most northern latitudes. History The Magellanic Clouds have been known since ancient times to indigenous peoples across South America and Africa, and from the first millennium in Western Asia. The first preserved mention of the Large Magellanic Cloud is believed to be in petroglyphs and rock drawings found in Chile. They may be the objects mentioned by the polymath Ibn Qutay ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magellanic Clouds ― Irregular Dwarf Galaxies
Magellanic may refer to: *Magellanic Steppe, 7th largest desert in the world, see Patagonian Desert *Magellanic Straits, a sea passageway at the tip of South America, see Strait of Magellan *Magellanic subpolar forests, an ecoregion of southernmost Chile and Argentina *Magellanic Premium, a major prize established in 1786 regarding navigation Astronomy *Magellanic Clouds, two major Milky Way neighbouring galaxies, matter streams, or systems related to them: **Large Magellanic Cloud, a major satellite galaxy to the Milky Way **Small Magellanic Cloud, a smaller major satellite galaxy to the Milky Way *** Mini Magellanic Cloud, a sub-satellite galaxy separating from the Small Magellanic Cloud ** Magellanic Bridge, a neutral hydrogen stream with a few stars linking the two Magellanic Clouds, with a density of stars midway known as OGLE Island **Magellanic Stream, a neutral hydrogen gas halo and star envelope around the two Magellanic Clouds linking them to the Milky Way *Magellanic spir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Large Magellanic Cloud
The Large Magellanic Cloud (LMC), or Nubecula Major, is a satellite galaxy of the Milky Way. At a distance of around 50 kiloparsecs (≈160,000 light-years), the LMC is the second- or third-closest galaxy to the Milky Way, after the Sagittarius Dwarf Spheroidal (16 kpc) and the possible dwarf irregular galaxy known as the Canis Major Overdensity. Based on the D25 isophote at the B-band (445 nm wavelength of light), the Large Magellanic Cloud is approximately across. It is roughly a hundredth as massive as the Milky WayMagellanic Cloud . ''''. 2009. Encyclopædia Britannica Online. 30 Aug. 2009. and is the fourth-largest g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Book Of Fixed Stars
The ''Book of Fixed Stars'' ( ar, كتاب صور الكواكب ', literally ''The Book of the Shapes of Stars'') is an astronomical text written by Abd al-Rahman al-Sufi (Azophi) around 964. Following the translation movement in the 9th century AD, the book was written in Arabic, the common language for scholars across the vast Islamic territories, although the author himself was Persian. It was an attempt to create a synthesis of the comprehensive star catalogue in Ptolemy’s ''Almagest'' (books VII and VIII) with the indigenous Arabic astronomical traditions on the constellations (notably the Bedouin constellation system of the ''Anwā’''). The original manuscript no longer survives as an autograph, however, the importance of tradition and the practice of diligence central to Islamic manuscript tradition have ensured the survival of the ''Book of Stars'' in later-made copies. Historical context The treatise was written in the Persian city of Shiraz, for the patron and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Al Sufi
ʿAbd al-Rahman al-Sufi ( fa, عبدالرحمن صوفی; December 7, 903 – May 25, 986) was an iranianRobert Harry van Gent. Biography of al-Sūfī'. "The Persian astronomer Abū al-Husayn ‘Abd al-Rahmān ibn ‘Umar al-Sūfī was born in Rayy (near Tehrān) on 7 December 903 4 Muharram 291 Hand died in Baghdād on 25 May 986 3 Muharram 376 H... the Persian astronomer Abū al-Husayn ‘Abd al-Rahmān ibn ‘Umar al-Sūfī who was commonly known by European astronomers as Azophi Arabus". University of Utrecht, Netherlands. Retrieved January 11, 2014 astronomer also known as ʿAbd ar-Rahman as-Sufi, ʿAbd al-Rahman Abu al-Husayn, ʿAbdul Rahman Sufi, or ʿAbdurrahman Sufi and, historically, in the West as Azophi, Azophi Arabus, and Albuhassin. Al-Sufi published his famous ''Book of Fixed Stars'' in 964, which included both textual descriptions and pictures. Al-Biruni reports that his work on the ecliptic was carried out in Shiraz. He lived at the Buyid court in Isfahan. B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tihama
Tihamah or Tihama ( ar, تِهَامَةُ ') refers to the Red Sea coastal plain of the Arabian Peninsula from the Gulf of Aqaba to the Bab el Mandeb. Etymology Tihāmat is the Proto-Semitic language's term for 'sea'. Tiamat (or Tehom, in masculine form) was the ancient Mesopotamian god of the sea and of chaos. The word appears in the Hebrew Bible as təhōm (Genesis 1:2), meaning "primordial ocean, abyss". History Era of Muhammad During the era of the Islamic prophet Muhammad, many military expeditions took place here including the Battle of Hamra al-Asad and caravan raids. Beginning in January 623 CE, some of the Muslims resorted to the tradition of raiding the Meccan caravans that traveled along the eastern coast of the Red Sea from Mecca to the Syrian region. While at Ḥamra' al-Asad (), Muhammad made an agreement with Mabad al-Khuzaah at Tihamah, in which Mabad pledged not to conceal anything from him. Mabad was then sent to Mecca to dissuade Abu Sufyan ibn Harb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iraq
Iraq,; ku, عێراق, translit=Êraq officially the Republic of Iraq, '; ku, کۆماری عێراق, translit=Komarî Êraq is a country in Western Asia. It is bordered by Turkey to Iraq–Turkey border, the north, Iran to Iran–Iraq border, the east, the Persian Gulf and Kuwait to the southeast, Saudi Arabia to the south, Jordan to Iraq–Jordan border, the southwest and Syria to Iraq–Syria border, the west. The Capital city, capital and largest city is Baghdad. Iraq is home to diverse ethnic groups including Iraqi Arabs, Kurds, Iraqi Turkmen, Turkmens, Assyrian people, Assyrians, Armenians in Iraq, Armenians, Yazidis, Mandaeans, Iranians in Iraq, Persians and Shabaks, Shabakis with similarly diverse Geography of Iraq, geography and Wildlife of Iraq, wildlife. The vast majority of the country's 44 million residents are Muslims – the notable other faiths are Christianity in Iraq, Christianity, Yazidism, Mandaeism, Yarsanism and Zoroastrianism. The official langu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canopus
Canopus is the brightest star in the southern constellation of Carina (constellation), Carina and the list of brightest stars, second-brightest star in the night sky. It is also Bayer designation, designated α Carinae, which is Latinisation of names, Latinised to Alpha Carinae. With a visual apparent magnitude of −0.74, it is outshone only by Sirius. Located around from the Sun, Canopus is a bright giant of spectral type A9, so it is essentially white when seen with the naked eye. It has a luminosity over 10,000 times the luminosity of the Sun, is eight times as mass of the Sun, massive, and has expanded to 71 times the Sun's radius. Its enlarged photosphere has an effective temperature of around . Canopus is undergoing stellar core, core helium fusion, helium burning and is currently in the so-called blue loop phase of its stellar evolution, evolution, having already passed through the red-giant branch after exhausting the hydrogen in its core. Canopus is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pre-Islamic Arabia
Pre-Islamic Arabia ( ar, شبه الجزيرة العربية قبل الإسلام) refers to the Arabian Peninsula before the History of Islam, emergence of Islam in 610 CE. Some of the settled communities developed into distinctive civilizations. Information about these communities is limited and has been pieced together from archaeological evidence, accounts written outside of Arabia, and Arab oral traditions which were later recorded by List of Muslim historians, Islamic historians. Among the most prominent civilizations were the Thamud civilization, which arose around 3000 BCE and lasted to around 300 CE, and the earliest Semitic civilization in the eastern part was Dilmun, which arose around the end of the fourth millennium and lasted to around 600 CE. Additionally, from the second half of the second millennium BCE,Kenneth A. Kitchen The World of "Ancient Arabia" Series. Documentation for Ancient Arabia. Part I. Chronological Framework and Historical Sources p.110 Southern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ibn Qutaybah
Abū Muḥammad ʿAbd Allāh ibn Muslim ibn Qutayba al-Dīnawarī al-Marwazī better known simply as Ibn Qutaybah ( ar-at, ابن قتيبة, Ibn Qutaybah; c. 828 – 13 November 889 CE / 213 – 15 Rajab 276 AH) was an Islamic scholar of Persian descent. He served as a judge during the Abbasid Caliphate, but was best known for his contributions to Arabic literature.Abd Allah Abu Muhammad Abd Allah ibn Muslim al-Dinwari Ibn Qutaybah from . , ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polymath
A polymath ( el, πολυμαθής, , "having learned much"; la, homo universalis, "universal human") is an individual whose knowledge spans a substantial number of subjects, known to draw on complex bodies of knowledge to solve specific problems. In Western Europe, the first work to use the term polymathy in its title () was published in 1603 by Johann von Wowern, a Hamburg philosopher. Von Wowern defined polymathy as "knowledge of various matters, drawn from all kinds of studies ... ranging freely through all the fields of the disciplines, as far as the human mind, with unwearied industry, is able to pursue them". Von Wowern lists erudition, literature, philology, philomathy, and polyhistory as synonyms. The earliest recorded use of the term in the English language is from 1624, in the second edition of ''The Anatomy of Melancholy'' by Robert Burton; the form ''polymathist'' is slightly older, first appearing in the ''Diatribae upon the first part of the late History ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chile
Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east and the Pacific Ocean to the west. Chile covers an area of , with a population of 17.5 million as of 2017. It shares land borders with Peru to the north, Bolivia to the north-east, Argentina to the east, and the Drake Passage in the far south. Chile also controls the Pacific islands of Juan Fernández, Isla Salas y Gómez, Desventuradas, and Easter Island in Oceania. It also claims about of Antarctica under the Chilean Antarctic Territory. The country's capital and largest city is Santiago, and its national language is Spanish. Spain conquered and colonized the region in the mid-16th century, replacing Inca rule, but failing to conquer the independent Mapuche who inhabited what is now south-central Chile. In 1818, after declaring in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petroglyph
A petroglyph is an image created by removing part of a rock surface by incising, picking, carving, or abrading, as a form of rock art. Outside North America, scholars often use terms such as "carving", "engraving", or other descriptions of the technique to refer to such images. Petroglyphs are found worldwide, and are often associated with prehistoric peoples. The word comes from the Greek prefix , from meaning "stone", and meaning "carve", and was originally coined in French as . Another form of petroglyph, normally found in literate cultures, a rock relief or rock-cut relief is a relief sculpture carved on "living rock" such as a cliff, rather than a detached piece of stone. While these relief carvings are a category of rock art, sometimes found in conjunction with rock-cut architecture, they tend to be omitted in most works on rock art, which concentrate on engravings and paintings by prehistoric or nonliterate cultures. Some of these reliefs exploit the rock's nat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
