 |
Solar Observation
Solar observation is the scientific endeavor of studying the Sun and its behavior and relation to the Earth and the remainder of the Solar System. Deliberate solar observation began thousands of years ago. That initial era of direct observation gave way to telescopes in the 1600s followed by satellites in the twentieth century. Prehistory Stratigraphy, Stratigraphic data suggest that solar cycles have occurred for hundreds of millions of years, if not longer; measuring varves in precambrian sedimentary rock has revealed repeating peaks in layer thickness corresponding to the cycle. It is possible that the early atmosphere on Earth was more sensitive to solar irradiation than today, so that greater glacial melting (and thicker sediment deposits) could have occurred during years with greater sunspot activity. This would presume annual layering; however, alternative explanations (diurnal) have also been proposed. Analysis of tree rings revealed a detailed picture of past solar cycle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
 |
Solar System
The Solar SystemCapitalization of the name varies. The International Astronomical Union, the authoritative body regarding astronomical nomenclature, specifies capitalizing the names of all individual astronomical objects but uses mixed "Solar System" and "solar system" structures in theinaming guidelines document. The name is commonly rendered in lower case ('solar system'), as, for example, in the ''Oxford English Dictionary'' an''Merriam-Webster's 11th Collegiate Dictionary''. is the gravitationally bound Planetary system, system of the Sun and the objects that orbit it. It Formation and evolution of the Solar System, formed about 4.6 billion years ago when a dense region of a molecular cloud collapsed, forming the Sun and a protoplanetary disc. The Sun is a typical star that maintains a hydrostatic equilibrium, balanced equilibrium by the thermonuclear fusion, fusion of hydrogen into helium at its stellar core, core, releasing this energy from its outer photosphere. As ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
|
Timeline Of Chinese Astronomy
This is a timeline of Chinese records and investigations in astronomy. *2137 BC - October 22, the Chinese book, the ''Book of Documents'', records the earliest known solar eclipse. *c. 2000 BC - Chinese determine that Jupiter needs 12 years to complete one revolution of its orbit. *c. 1400 BC - Chinese record the regularity of solar and lunar eclipses and the earliest known Solar prominence and two novas (). *c. 1200 BC - Chinese divide the sky into twenty eight regions (Chinese constellations) for recognition of the stars. *c. 1100 BC - Chinese first determine the spring equinox. *776 BC - Chinese make the earliest reliable record of a solar eclipse. *613 BC - In July, a Comet, possibly Comet Halley, is recorded in the ''Spring and Autumn Annals'' (). *532 BC - A nova was recorded in the ''Records of the Grand Historian'' and Zuo Zhuan (). *364 BC - Earliest recorded observation of sunspots made by Gan De. *28 BC - May 10, Chinese imperial history book, the ''Book of Han'', ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
|
 |
Johannes Kepler
Johannes Kepler (27 December 1571 – 15 November 1630) was a German astronomer, mathematician, astrologer, Natural philosophy, natural philosopher and writer on music. He is a key figure in the 17th-century Scientific Revolution, best known for his Kepler's laws of planetary motion, laws of planetary motion, and his books ''Astronomia nova'', ''Harmonice Mundi'', and ''Epitome Astronomiae Copernicanae'', influencing among others Isaac Newton, providing one of the foundations for his theory of Newton's law of universal gravitation, universal gravitation. The variety and impact of his work made Kepler one of the founders and fathers of modern astronomy, the scientific method, Natural science, natural and modern science. He has been described as the "father of science fiction" for his novel ''Somnium (novel), Somnium''. Kepler was a mathematics teacher at a seminary school in Graz, where he became an associate of Hans Ulrich von Eggenberg, Prince Hans Ulrich von Eggenberg. Lat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
 |
Giordano Bruno
Giordano Bruno ( , ; ; born Filippo Bruno; January or February 1548 – 17 February 1600) was an Italian philosopher, poet, alchemist, astrologer, cosmological theorist, and esotericist. He is known for his cosmological theories, which conceptually extended to include the then-novel Copernican model. He practiced Hermeticism and gave a mystical stance to exploring the universe. He proposed that the stars were distant suns surrounded by their own planets (exoplanets), and he raised the possibility that these planets might foster life of their own, a cosmological position known as cosmic pluralism. He also insisted that the universe is infinite and could have no center. Bruno was tried for heresy by the Roman Inquisition on charges of denial of several core Catholic doctrines, including eternal damnation, the Trinity, the divinity of Christ, the virginity of Mary, and transubstantiation. Bruno's pantheism was not taken lightly by the church, nor was his teaching of met ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
 |
Sun In Samuel Dunn Wall Map Of The World
The Sun is the star at the centre of the Solar System. It is a massive, nearly perfect sphere of hot Plasma (physics), plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light and infrared radiation with 10% at ultraviolet energies. It is by far the most important source of energy for life on Earth. The Sun has been an The Sun in culture, object of veneration in many cultures. It has been a central subject for astronomical research since Ancient history, antiquity. The Sun orbits the Galactic Center at a distance of 24,000 to 28,000 light-years. Its distance from Earth defines the astronomical unit, which is about or about 8 light-minutes. Solar radius, Its diameter is about (), 109 times that of Earth. solar mass, The Sun's mass is about 330,000 times that of Earth, making up about 99.86% of the total mass of the Solar System. The mass of outer layer of the Sun's atmosphere, its ''photosphere'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
 |
Novgorod First Chronicle
The Novgorod First Chronicle ( rus, Новгоро́дская пе́рвая ле́топись, Novgoródskaya pérvaya létopisʹ, nəvɡɐˈrot͡skəjə ˈpʲervəjə ˈlʲetəpʲɪsʲ, commonly abbreviated as NPL), also known by its 1914 English edition title ''The Chronicle of Novgorod, 1016–1471'', is the oldest extant Rus' chronicle of the Novgorod Republic. Written in Old East Slavic, it reflects a literary tradition about Kievan Rus' which differs from the '' Primary Chronicle''. The earliest extant copy of the NPL is the so-called Synod Scroll (), dated to the second half of the 13th century. First printed in 1841, it is currently preserved in the State Historical Museum. It is the earliest known manuscript of a major Old East Slavic chronicle, predating the '' Laurentian Codex'' of the ''Primary Chronicle'' by almost a century. In the 14th century, the Synod Scroll was continued by the monks of the Yuriev Monastery in Novgorod. Other important copies of the ''Novg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
 |
Sunspot Drawing
Sunspot drawing or sunspot sketching is the act of drawing sunspots. Sunspots are darker spots on the Sun's photosphere. Their prediction is very important for radio communication because they are strongly associated with solar activity, which can seriously damage radio equipment. History Sunspots were probably first drawn by an English monk John of Worcester on 8 December 1128. There are records of observing sunspots from 28 BC, but that is the first known drawing of sunspots, almost 500 years before the telescope. His drawing seems to come around solar maximum. Five days later, the Korean astronomer saw the Aurora borealis, northern lights above his country, so this is also the first prediction of coronal mass ejection. In 1612, Galileo Galilei was writing letters on sunspots to Mark Welser. They were published in 1613. In his telescope, he saw some darker spots on Sun's surface. It seems like he was observing the Sun and drawing sunspots without any filter, which is very hard ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
|
Leo Diaconus
Leo the Deacon (; born ) was a Byzantine Greek historian and chronicler. He was born around 950 at Kaloe in Asia Minor, and was educated in Constantinople, where he became a deacon in the imperial palace. While in Constantinople he wrote a history covering the reigns of Romanos II, Nikephoros II, John Tzimiskes, and the early part of the reign of Basil II. Often his observations were based on his experiences as an eyewitness to events. His writing style has been described as "Classical", as he employed language reminiscent of the poet Homer and other ancient Greek historians such as Agathias. Leo is particularly well known for his eyewitness description of Sviatoslav I of Kiev, who invaded Bulgaria in 969 and fought against Byzantine Imperial forces over its territory. References *''The History of Leo the Deacon: Byzantine military expansion in the tenth century''. Introd., transl., and annotations by Alice-Mary Talbot and Denis F. Sullivan (Washington, DC, 2005). External link ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
|
 |
University Of Cairo
Cairo University () is Egypt's premier public university. Its main campus is in Giza, immediately across the Nile from Cairo. It was founded on 21 December 1908;"Brief history and development of Cairo University." Cairo University Faculty of Engineering. http://www.eng.cu.edu.eg/CUFE/History/CairoUniversityShortNote/tabid/81/language/en-US/Default.aspx after being housed in various parts of Cairo, its faculties, beginning with the Faculty of Arts, were established on its current main campus in Giza in October 1929. The university was known as the Egyptian University from 1908 to 1940, and King Fuad I University and Fu'ād al-Awwal University from 1940 to 1952. The university is the second oldest institution of higher education in Egypt after Al-Azhar University, notwithstanding the pre-existing higher professional schools that later became constituent colleges of the university. The university was founded and funded as the Egyptian University by a committee of private citizens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
 |
Averroes
Ibn Rushd (14 April 112611 December 1198), archaically Latinization of names, Latinized as Averroes, was an Arab Muslim polymath and Faqīh, jurist from Al-Andalus who wrote about many subjects, including philosophy, theology, medicine, astronomy, physics, psychology, mathematics, neurology, Islamic jurisprudence and Islamic law, law, and linguistics. The author of more than 100 books and treatises, his philosophical works include numerous commentaries on Aristotle, for which he was known in the Western world as ''The Commentator'' and ''Father of Rationalism''. Averroes was a strong proponent of Aristotelianism; he attempted to restore what he considered the original teachings of Aristotle and opposed the Neoplatonism, Neoplatonist tendencies of earlier Muslims, Muslim thinkers, such as al-Farabi and Avicenna. He also defended the pursuit of philosophy against criticism by Ash'ari theologians such as Al-Ghazali. Averroes argued that philosophy was permissible in Islam and eve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
|
John Of Worcester
John of Worcester (died c. 1140) was an English monk and chronicler who worked at Worcester Priory. He is now usually held to be the author of the . Works John of Worcester's principal work was the (Latin for "Chronicle from Chronicles") or ''Chronicle of Chronicles'' (), also known as John of Worcester's Chronicle or Florence of Worcester's Chronicle. The is a world history which begins with the Creation and ends in 1140. The chronological framework of the was presented by the chronicle of Marianus Scotus (d. 1082). A great deal of additional material, particularly relating to English history, was grafted onto it. Authorship The greater part of the work, up to 1117 or 1118, was formerly attributed to Florence of Worcester on the basis of the entry for his death under the year 1118, which credits his skill and industry for making the chronicle such a prominent work. In this view, the other Worcester monk, John, merely wrote the final part of the work. However, there are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |