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993 Establishments
Year 993 (Roman numerals, CMXCIII) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. Events By place Europe * Spring – The 12-year-old King Otto III gives the Sword of Saints Cosmas and Damian (also known as the Sword of Essen) as a gift to the convent in Essen. It symbolises the martyrdom of Saints Cosmas and Damian, Cosmas and Damian, the patron saints of the city. * Charles, Duke of Lower Lorraine, Charles, duke of Lower Lorraine, dies in prison in Orléans (see 991). He is succeeded by his son Otto, Duke of Lower Lorraine, Otto II, who inherits the full dukedom and pledges his allegiance to Otto III. By topic Religion * July 4 – Pope Pope John XV, John XV issues a decree Canonization, canonizing the late Bishop Ulrich of Augsburg, the first recorded canonization of a saint. Astronomy * An increase in carbon-14, concentration, recorded in Dendrochronology#Growth rings, tree rings, as well as Chlo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canonization
Canonization is the declaration of a deceased person as an officially recognized saint, specifically, the official act of a Christian communion declaring a person worthy of public veneration and entering their name in the canon catalogue of saints, or authorized list of that communion's recognized saints. Catholic Church Canonization is a papal declaration that the Catholic faithful may venerate a particular deceased member of the church. Popes began making such decrees in the tenth century. Up to that point, the local bishops governed the veneration of holy men and women within their own dioceses; and there may have been, for any particular saint, no formal decree at all. In subsequent centuries, the procedures became increasingly regularized and the Popes began restricting to themselves the right to declare someone a Catholic saint. In contemporary usage, the term is understood to refer to the act by which any Christian church declares that a person who has died is a sa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Samuel Ibn Naghrillah
Samuel ibn Naghrillah (, ''Sh'muel HaLevi ben Yosef HaNagid''; ''ʾAbū ʾIsḥāq ʾIsmāʿīl bin an-Naghrīlah''), also known as Samuel HaNagid (, ''Shmuel HaNagid'', lit. ''Samuel the Prince'') and Isma’il ibn Naghrilla (born 993; died 1056), was a medieval Jewish Spanish Talmudic scholar, grammarian, philologist, soldier, merchant, politician, and an influential poet who lived in Iberia at the time of the Moorish rule. His poetry was one area through which he was well known. Marcus, Jacob Rader. "59: Samuel Ha-Nagid, Vizier of Granada." ''The Jew in the Medieval World: A Source Book, 315-1791.'' Cincinnati: Union of American Hebrew Congregations, 1938. 335-38. He was perhaps the most politically influential Jew in Muslim Spain. Stillman, Norman A. ''The Jews of Arab Lands: A History and Source Book'', The Jewish Publication Society of America,1979. 56 He was also the Prime Minister of the Muslim state of Granada and battlefield commander of the non-Jewish Granadan army. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1029
Year 1029 ( MXXIX) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. Events By place Europe * Prince Pandulf IV of Capua becomes the '' de facto'' ruler of southern Italy – holding Capua and Naples himself – this in support with his powerful allies Amalfi, Salerno and Benevento. Only the Duchy of Gaeta remains out of his grasp. * Rainulf Drengot, head of a mercenary band of Norman knights, is approached by Duke John V of Gaeta and is persuaded to change sides. With Norman help, Duke Sergius IV recovers Naples from Capuan occupation. * Duke Bretislav I (Bohemian Achilles) of Bohemia of the Přemyslid Dynasty reconquers Moravia from Poland (approximate date). By topic Religion * The seat of the Bishopric of Zeitz is moved to Naumburg ( Saxony-Anhalt) in Central Germany. Births * January 20 – Alp Arslan (Heroic Lion), sultan of the Seljuk Empire (d. 1072) * July 5 – Al-Mustansir Billa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rey, Iran
Shahr-e Ray ( fa, شهر ری, ) or simply Ray (Shar e Ray; ) is the capital of Ray County in Tehran Province, Iran. Formerly a distinct city, it has now been absorbed into the metropolitan area of Greater Tehran as the 20th district of municipal Tehran, the capital city of the country. Historically known as Rhages (), Rhagae and Arsacia, Ray is the oldest existing city in Tehran Province. In the classical era, it was a prominent city belonging to Media, the political and cultural base of the Medes. Ancient Persian inscriptions and the Avesta (Zoroastrian scriptures), among other sources, attest to the importance of ancient Ray. Ray is mentioned several times in the Apocrypha. It is also shown on the fourth-century Peutinger Map. The city was subject to severe destruction during the medieval invasions by the Arabs, Turks, and Mongols. Its position as a capital city was revived during the reigns of the Buyid Daylamites and the Seljuk Turks. Ray is richer than many other anc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Majd Al-Dawla
Abu Talib Rustam ( fa, ابو طالب رستم; 997–1029), commonly known by his ''laqab'' (honorific title) of Majd al-Dawla (), was the last ''amir'' (ruler) of the Buyid amirate of Ray from 997 to 1029. He was the eldest son of Fakhr al-Dawla (). A weak ruler, he was a figurehead most of his reign, whilst his mother Sayyida Shirin was the real ruler of the kingdom. Majd al-Dawla's reign saw the gradual shrinking of Buyid holdings in central Iran; Gurgan and Tabaristan had been lost to the Ziyarids in 997, while several of the western towns were seized by the Sallarids of Azerbaijan. There were also internal troubles, such as the revolt of the Daylamite military officer Ibn Fuladh in 1016. Following the death of Sayyida Shirin in 1028, Majd al-Dawla was faced with a revolt by his Daylamite soldiers, and thus requested the assistance of the Ghaznavid ruler Mahmud () in dealing with them. Mahmud came to Ray in 1029, deposed Majd al-Dawla as ruler, and sacked the city, bringi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large volumes of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surface is made up of the ocean, dwarfing Earth's polar ice, lakes, and rivers. The remaining 29% of Earth's surface is land, consisting of continents and islands. Earth's surface layer is formed of several slowly moving tectonic plates, which interact to produce mountain ranges, volcanoes, and earthquakes. Earth's liquid outer core generates the magnetic field that shapes the magnetosphere of the Earth, deflecting destructive solar winds. The atmosphere of the Earth consists mostly of nitrogen and oxygen. Greenhouse gases in the atmosphere like carbon dioxide (CO2) trap a part of the energy from the Sun close to the surface. Water vapor is widely present in the atmosphere and forms clouds that cover most of the planet. More solar e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
993–994 Carbon-14 Spike
The 993–994 carbon-14 spike was a rapid 0.91% increase in carbon-14 isotope content from tree rings. This event was also confirmed with an associated increase of beryllium-10 in Antarctic ice core samples, supporting the hypothesis that this event was of solar origin. There were several astronomical observations during this time that correspond with the 14C and 10Be spikes, but these texts are few and far between. In 2021, a scientific paper used the 993–994 carbon-14 spike as a benchmark in dendrochronology (tree-ring studies) to precisely determine that Vikings were present in L’Anse aux Meadows in Newfoundland exactly 1000 years prior, in 1021 AD. Historical observations The solar storm hypothesis is heavily supported by several observations of aurora events from late 992 in Korea, Germany and Ireland, usually describing a red sky, presumably due to major auroras. These historical observations don't completely prove the cause of the 993-994 14C spike, but show evidence ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ice Core
An ice core is a core sample that is typically removed from an ice sheet or a high mountain glacier. Since the ice forms from the incremental buildup of annual layers of snow, lower layers are older than upper ones, and an ice core contains ice formed over a range of years. Cores are drilled with hand augers (for shallow holes) or powered drills; they can reach depths of over two miles (3.2 km), and contain ice up to 800,000 years old. The physical properties of the ice and of material trapped in it can be used to reconstruct the climate over the age range of the core. The proportions of different oxygen and hydrogen isotopes provide information about ancient temperatures, and the air trapped in tiny bubbles can be analysed to determine the level of atmospheric gases such as carbon dioxide. Since heat flow in a large ice sheet is very slow, the borehole temperature is another indicator of temperature in the past. These data can be combined to find the climate m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beryllium-10
Beryllium-10 (10Be) is a radioactive isotope of beryllium. It is formed in the Earth's atmosphere mainly by cosmic ray spallation of nitrogen and oxygen. Beryllium-10 has a half-life of 1.39 × 106 years, and decays by beta decay to stable boron-10 with a maximum energy of 556.2 keV. It decays through the reaction 10Be→10B + e−. Light elements in the atmosphere react with high energy galactic cosmic ray particles. The spallation of the reaction products is the source of 10Be (t, u particles like n or p): :14N(t,5u)10Be; Example: 14N(n,p α)10Be :16O(t,7u)10Be Because beryllium tends to exist in solutions below about pH 5.5 (and rainwater above many industrialized areas can have a pH less than 5), it will dissolve and be transported to the Earth's surface via rainwater. As the precipitation quickly becomes more alkaline, beryllium drops out of solution. Cosmogenic 10Be thereby accumulates at the soil surface, where its relatively long half-life (1.387 million years) permit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chlorine-36
Chlorine-36 (36Cl) is an isotope of chlorine. Chlorine has two stable isotopes and one naturally occurring radioactive isotope, the cosmogenic isotope 36Cl. Its half-life is 301,300 ± 1,500 years. 36Cl decays primarily (98%) by beta-minus decay to 36 Ar, and the balance to 36 S. Trace amounts of radioactive 36Cl exist in the environment, in a ratio of about (7–10) × 10−13 to 1 with stable chlorine isotopes. This corresponds to a concentration of approximately 1 Bq/(kg Cl). 36Cl is produced in the atmosphere by spallation of 36 Ar by interactions with cosmic ray protons. In the top meter of the lithosphere, 36Cl is generated primarily by thermal neutron activation of 35Cl and spallation of 39 K and 40 Ca. In the subsurface environment, muon capture by 40 Ca becomes more important. The production rates are about 4200 atoms 36Cl/yr/mole 39K and 3000 atoms 36Cl/yr/mole 40Ca, due to spallation in rocks at sea level. The half-life of this isotope makes it suitable ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dendrochronology
Dendrochronology (or tree-ring dating) is the scientific method of dating tree rings (also called growth rings) to the exact year they were formed. As well as dating them, this can give data for dendroclimatology, the study of climate and atmospheric conditions during different periods in history from wood. Dendrochronology derives from Ancient Greek (), meaning "tree", (), meaning "time", and (), "the study of". Dendrochronology is useful for determining the precise age of samples, especially those that are too recent for radiocarbon dating, which always produces a range rather than an exact date. However, for a precise date of the death of the tree a full sample to the edge is needed, which most trimmed timber will not provide. It also gives data on the timing of events and rates of change in the environment (most prominently climate) and also in wood found in archaeology or works of art and architecture, such as old panel paintings. It is also used as a check in radioc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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