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Comet Of 1472
The great comet of 1472 was visible from Christmas Day 1471 to 1 March 1472 ( Julian Calendar), for a total of 59 days.Donald K. Yeomans, Jet Propulsion Laboratory: Great Comets in History', 2007. The comet passed 0.07 AU from Earth on 22 January 1472, closer than any other great comet in modern times. Observational history The first reports of the comet date from the Christmas Day of 1471, when the comet was located in Virgo. It became better visible in the second week of January 1472, when in Korean sources is mentioned it had a tail 4-5 degrees long. The comet was moving northwards and passed through Bootes, Coma Berenices and Ursa Major and was about 15 degrees from the north celestial pole on January 22, and the date of perigee, at a distance of . At that time the comet was moving about one degree per hour. Consequently, became better visible in the evening sky, as the comet moved southwards and towards perihelion. It was last observed around 11 March, when the comet w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuremberg Chronicles F 254r 1 Comet
Nuremberg ( ; german: link=no, Nürnberg ; in the local East Franconian dialect: ''Nämberch'' ) is the second-largest city of the Germany, German States of Germany, state of Bavaria after its capital Munich, and its 518,370 (2019) inhabitants make it the List of cities in Germany by population, 14th-largest city in Germany. On the Pegnitz (river), Pegnitz River (from its confluence with the Rednitz in Fürth onwards: Regnitz, a tributary of the Main (river), River Main) and the Rhine–Main–Danube Canal, it lies in the Bavarian Regierungsbezirk, administrative region of Middle Franconia, and is the largest city and the unofficial capital of Franconia. Nuremberg forms with the neighbouring cities of Fürth, Erlangen and Schwabach a continuous conurbation with a total population of 800,376 (2019), which is the heart of the urban area region with around 1.4 million inhabitants, while the larger Nuremberg Metropolitan Region has approximately 3.6 million inhabitants. The city ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Warkworth
John Warkworth Doctor of Divinity, DD (c. 1425 – 1500) was an English churchman and academic, a Master of Peterhouse, Cambridge. He is no longer considered to be a chronicler of Edward IV, the so-called ''Warkworth's Chronicle'' now being attributed to one of two other fellows of Peterhouse. Warkworth has been subject to another confusion, with another fellow of Peterhouse of the same name. References Masters of Peterhouse, Cambridge Year of birth uncertain 1500 deaths 15th-century English educators 1425 births English male writers {{England-academic-bio-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1472
Year 1472 ( MCDLXXII) was a leap year starting on Wednesday (link will display the full calendar) of the Julian calendar. Events January–December * February 20 – Orkney and Shetland are returned by Norway to Scotland, as a result of a defaulted dowry payment. * March 4 – A mount of piety is established in Siena (Italy), origin of Banca Monte dei Paschi di Siena, the world's oldest surviving retail bank. * April 11 – The first printed edition of Dante Alighieri's ''Divine Comedy'' is published in Foligno. * June ** 20-year-old Leonardo da Vinci is admitted as a master in his own right to the artists' Guild of Saint Luke in Florence. ** (approximate date) – Volterra, a town in Italy, is sacked by Florentine soldiers for challenging the power of Lorenzo de' Medici. * July 3 – The Cathedral and Metropolitical Church of Saint Peter in York, England, commonly known as York Minster, is declared complete and consecrated. * December 31 – The c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Comet Of 1577
The Great Comet of 1577 (official designation: C/1577 V1) is a non-periodic comet that passed close to Earth during the year 1577 AD. Having an official designation beginning with "C" classes it as a non-periodic comet, and so it is not expected to return. In 1577, the comet was visible to all of Europe, and was recorded by many contemporaries of the time, including the famous Danish astronomer Tycho Brahe and Turkish astronomer Taqi ad-Din. From his observations of the comet, Brahe was able to discover that comets and similar objects travel above the Earth's atmosphere. The best fit using JPL Horizons suggests that the comet is currently about 320 AU from the Sun (based on 24 of Brahe's observations spanning 74 days from 13 November 1577 to 26 January 1578).NASAJPL Small-body database browserplot and approximate distance. (needs Java) Observations by Brahe and others Using all the records to estimate the orbit, it seems that the perihelion was on October 27. The first r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halley's Comet
Halley's Comet or Comet Halley, officially designated 1P/Halley, is a short-period comet visible from Earth every 75–79 years. Halley is the only known short-period comet that is regularly visible to the naked eye from Earth, and thus the only naked-eye comet that can appear twice in a human lifetime. Halley last appeared in the inner parts of the Solar System in 1986 and will next appear in mid-2061. Halley's periodic returns to the inner Solar System have been observed and recorded by astronomers around the world since at least 240 BC. But it was not until 1705 that the English astronomer Edmond Halley understood that these appearances were reappearances of the same comet. As a result of this discovery, the comet is named after Halley. During its 1986 visit to the inner Solar System, Halley's Comet became the first comet to be observed in detail by spacecraft, providing the first observational data on the structure of a comet nucleus and the mechanism of coma and tail f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comet Hyakutake
Comet Hyakutake (, formally designated C/1996 B2) is a comet, discovered on 31 January 1996, that passed very close to Earth in March of that year. It was dubbed the Great Comet of 1996; its passage near the Earth was one of the closest cometary approaches of the previous 200 years. Hyakutake appeared very bright in the night sky and was widely seen around the world. The comet temporarily upstaged the much anticipated Comet Hale–Bopp, which was approaching the inner Solar System at the time. Scientific observations of the comet led to several discoveries. Most surprising to cometary scientists was the first discovery of X-ray emission from a comet, believed to have been caused by ionised solar wind particles interacting with neutral atoms in the coma of the comet. The ''Ulysses'' spacecraft unexpectedly crossed the comet's tail at a distance of more than from the nucleus, showing that Hyakutake had the longest tail known for a comet. Hyakutake is a long-period comet. B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Comet Of 1556
The Great Comet of 1556 (designated C/1556 D1 in modern nomenclature) was a comet that first appeared in February 1556, and which was observed throughout much of Europe. The comet appears to have been seen in some places before the end of February, but it was not generally observed until the middle of the first week in March. Its apparent diameter was equal to half that of the Moon, and the tail was said to resemble "the flame of a torch agitated by the wind." Cornelius Gemma (the son of Gemma Frisius) said that the head of the comet, when it first appeared, was as large as Jupiter, and that its color resembled that of Mars. The course of the comet of 1556 was observed by Paul Fabricius, a mathematician and physician at the court of Charles V, Holy Roman Emperor. Charles V comet The Great Comet of 1556 is called the comet of Charles V. When the Emperor first caught sight of it he stood aghast, and exclaimed: "By this dread sign my fates do summon me". Charles had long meditate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parallax
Parallax is a displacement or difference in the apparent position of an object viewed along two different lines of sight and is measured by the angle or semi-angle of inclination between those two lines. Due to foreshortening, nearby objects show a larger parallax than farther objects when observed from different positions, so parallax can be used to determine distances. To measure large distances, such as the distance of a planet or a star from Earth, astronomers use the principle of parallax. Here, the term ''parallax'' is the semi-angle of inclination between two sight-lines to the star, as observed when Earth is on opposite sides of the Sun in its orbit. These distances form the lowest rung of what is called "the cosmic distance ladder", the first in a succession of methods by which astronomers determine the distances to celestial objects, serving as a basis for other distance measurements in astronomy forming the higher rungs of the ladder. Parallax also affects optical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuremberg
Nuremberg ( ; german: link=no, Nürnberg ; in the local East Franconian dialect: ''Nämberch'' ) is the second-largest city of the German state of Bavaria after its capital Munich, and its 518,370 (2019) inhabitants make it the 14th-largest city in Germany. On the Pegnitz River (from its confluence with the Rednitz in Fürth onwards: Regnitz, a tributary of the River Main) and the Rhine–Main–Danube Canal, it lies in the Bavarian administrative region of Middle Franconia, and is the largest city and the unofficial capital of Franconia. Nuremberg forms with the neighbouring cities of Fürth, Erlangen and Schwabach a continuous conurbation with a total population of 800,376 (2019), which is the heart of the urban area region with around 1.4 million inhabitants, while the larger Nuremberg Metropolitan Region has approximately 3.6 million inhabitants. The city lies about north of Munich. It is the largest city in the East Franconian dialect area (colloquially: "F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bernhard Walther
Bernhard Walther (1430June 19, 1504) was a German merchant, humanist and astronomer based in Nuremberg, Germany. Walther was born in Memmingen, and was a man of large means, which he devoted to scientific pursuits. When Regiomontanus settled in Nuremberg in 1471, they worked in collaboration to build an observatory and a printing press. After the death of Regiomontanus in 1476 at Rome, Walther bought his instruments, after Hans von Dorn, commissioned by the Hungarian king, had failed to come to an agreement with the council of Nuremberg. Walther continued to observe the planets until his death in Nuremberg. His house, purchased in 1509 by Albrecht Dürer, is today a museum. Astronomy Walther amplified on the effects of refraction in altering the apparent location of the heavenly bodies, and substituted Venus for the Moon as a connecting-link between observations of the Sun and stars. As a result, his observations are the most precise prior to those of Tycho Brahe. His pupil Joh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copernican Revolution
The Copernican Revolution was the paradigm shift from the Ptolemaic model of the heavens, which described the cosmos as having Earth stationary at the center of the universe, to the heliocentric model with the Sun at the center of the Solar System. This revolution consisted of two phases; the first being extremely mathematical in nature and the second phase starting in 1610 with the publication of a pamphlet by Galileo. Beginning with the publication of Nicolaus Copernicus’s ''De revolutionibus orbium coelestium'', contributions to the “revolution” continued until finally ending with Isaac Newton’s work over a century later. Heliocentrism Before Copernicus The "Copernican Revolution" is named for Nicolaus Copernicus, whose ''Commentariolus'', written before 1514, was the first explicit presentation of the heliocentric model in Renaissance scholarship. The idea of heliocentrism is much older; it can be traced to Aristarchus of Samos, a Hellenistic author writing in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Celestial Mechanics
Celestial mechanics is the branch of astronomy that deals with the motions of objects in outer space. Historically, celestial mechanics applies principles of physics (classical mechanics) to astronomical objects, such as stars and planets, to produce ephemeris data. History Modern analytic celestial mechanics started with Isaac Newton's Principia of 1687. The name "celestial mechanics" is more recent than that. Newton wrote that the field should be called "rational mechanics." The term "dynamics" came in a little later with Gottfried Leibniz, and over a century after Newton, Pierre-Simon Laplace introduced the term "celestial mechanics." Prior to Kepler there was little connection between exact, quantitative prediction of planetary positions, using geometrical or arithmetical techniques, and contemporary discussions of the physical causes of the planets' motion. Johannes Kepler Johannes Kepler (1571–1630) was the first to closely integrate the predictive geom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
