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Demetrios Eginitis
Demetrios Eginitis or Aiginitis ( el, Δημήτριος Αιγινήτης; July 10, 1862 – March 14, 1934) was a Greek astronomer, physicist, mathematician, author, professor, dean, and politician. He replaced Demetrios Kokkidis becoming the fifth director of the National Observatory of Athens and the longest-serving director in the Observatory's history. He was one of the few Greek astronomers in modern Greek history during the 1800s, others included Georgios Konstantinos Vouris and Johann Friedrich Julius Schmidt. He served as Minister of Education twice. Eginitis was born in Athens, he attended the prestigious Varvakeio School of Athens and later attended the University of Athens studying Mathematics from 1879 to 1886. He received a scholarship to study astronomy and mathematics at the Sorbonne from 1886 to 1890. While in France he wrote his world-renowned paper ''Sur la Stabilité du Système Solaire (On the Stability of the Solar System)'' and also published over o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
First Cemetery Of Athens
The First Cemetery of Athens ( el, Πρώτο Νεκροταφείο Αθηνών, ''Próto Nekrotafeío Athinón'') is the official cemetery of the City of Athens and the first to be built. It opened in 1837 and soon became a prestigious cemetery for Greeks and foreigners. The cemetery is located behind the Temple of Olympian Zeus and the Panathinaiko Stadium in central Athens. It can be found at the top end of Anapafseos Street (Eternal Rest Street). It is a large green space with pines and cypresses. In the cemetery there are three churches. The main one is the Church of Saint Theodores and there is also a smaller one dedicated to Saint Lazarus. The third church of Saint Charles is a Catholic church. The cemetery includes several impressive tombs such as those of Heinrich Schliemann, designed by Ernst Ziller; Ioannis Pesmazoglou; Georgios Averoff; and one tomb with a famous sculpture of a dead young girl called ''I Koimomeni'' ("The Sleeping Girl") and sculpted by Yannoul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vasileios Aiginitis
Vasileios is a Greek word meaning "royal", or "kingly". It may refer to: Places * Agios Vasileios, Achaea, village in the municipal unit of Rio, in Achaea, Greece * Agios Vasileios, Corinthia, village in the municipal unit of Tenea, in Corinthia, Greece People * Vasileios Christopoulos (born 1951), Greek writer * Vasileios Demetis (born 1983), Greek swimmer * Vasileios of Dryinoupolis (1858–1936), religious figure in the Greek Orthodox church in Northern Epirus *Vasileios Polymeros (born 1976), Greek rower * Vasileios Pliatsikas (born 1988), Greek footballer *Vasileios Spanoulis (born 1982), Greek professional basketball player *Vasileios Theodoridis Vasileios Theodoridis (Greek: Βασίλειος Θεοδωρίδης) was a Greek journalist and anarchist. Theodoridis was born in Pyrgos and studied law in Athens. He was descended from the famous Theodoridis family and was the son of Aristom ..., Greek journalist {{disambiguation, given name Greek masculine given names ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Secular Variation
The secular variation of a time series is its long-term, non-periodic variation (see decomposition of time series). Whether a variation is perceived as secular or not depends on the available timescale: a variation that is secular over a timescale of centuries may be a segment of what is, over a timescale of millions of years, a periodic variation. Natural quantities often have both periodic and secular variations. Secular variation is sometimes called secular trend or secular drift when the emphasis is on a linear long-term trend. The term is used wherever time series are applicable in history, economics, operations research, biological anthropology, and astronomy (particularly celestial mechanics) such as VSOP (planets). Etymology The word ''secular'', from the Latin root ''saecularis'' ("of an age, occurring once in an age"), has two basic meanings: I. Of or pertaining to the world (from which secularity is derived), and II. Of or belonging to an age or long period. The latte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meridian Circle
The meridian circle is an instrument for timing of the passage of stars across the local meridian, an event known as a culmination, while at the same time measuring their angular distance from the nadir. These are special purpose telescopes mounted so as to allow pointing only in the meridian, the great circle through the north point of the horizon, the north celestial pole, the zenith, the south point of the horizon, the south celestial pole, and the nadir. Meridian telescopes rely on the rotation of the sky to bring objects into their field of view and are mounted on a fixed, horizontal, east–west axis. The similar transit instrument, transit circle, or transit telescope is likewise mounted on a horizontal axis, but the axis need not be fixed in the east–west direction. For instance, a surveyor's theodolite can function as a transit instrument if its telescope is capable of a full revolution about the horizontal axis. Meridian circles are often called by these names, altho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Equatorial Coordinate System
The equatorial coordinate system is a celestial coordinate system widely used to specify the positions of celestial objects. It may be implemented in spherical or rectangular coordinates, both defined by an origin at the centre of Earth, a fundamental plane consisting of the projection of Earth's equator onto the celestial sphere (forming the celestial equator), a primary direction towards the vernal equinox, and a right-handed convention. The origin at the centre of Earth means the coordinates are ''geocentric'', that is, as seen from the centre of Earth as if it were transparent. The fundamental plane and the primary direction mean that the coordinate system, while aligned with Earth's equator and pole, does not rotate with the Earth, but remains relatively fixed against the background stars. A right-handed convention means that coordinates increase northward from and eastward around the fundamental plane. Primary direction This description of the orientation of the r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marie Alfred Cornu
Marie Alfred Cornu (; 6 March 1841 – 12 April 1902) was a French physicist. The French generally refer to him as Alfred Cornu. Life Cornu was born at Orléans to François Cornu and Sophie Poinsellier. He was educated at the École polytechnique and the École des mines. Upon the death of Émile Verdet in 1866, Cornu became, in 1867, Verdet's successor as professor of experimental physics at the École polytechnique, where he remained throughout his life. Although he made various excursions into other branches of physical science, undertaking, for example, with Jean-Baptistin Baille about 1870 a repetition of Cavendish's experiment for determining the gravitational constant ''G'', his original work was mainly concerned with optics and spectroscopy. In particular he carried out a classical redetermination of the speed of light by A. H. L. Fizeau's method (see Fizeau-Foucault Apparatus), introducing various improvements in the apparatus, which added greatly to the accuracy of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomical Spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, ultraviolet, X-ray, infrared and radio waves that radiate from stars and other celestial objects. A stellar spectrum can reveal many properties of stars, such as their chemical composition, temperature, density, mass, distance and luminosity. Spectroscopy can show the velocity of motion towards or away from the observer by measuring the Doppler shift. Spectroscopy is also used to study the physical properties of many other types of celestial objects such as planets, nebulae, galaxies, and active galactic nuclei. Background Astronomical spectroscopy is used to measure three major bands of radiation in the electromagnetic spectrum: visible light, radio waves, and X-rays. While all spectroscopy looks at specific bands of the spectrum, different methods are required to acquire the signal depending on the frequenc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nice Observatory
The Nice Observatory (french: Observatoire de Nice) is an astronomical observatory located in Nice, France on the summit of Mount Gros. The observatory was founded in 1879, by the banker Raphaël Bischoffsheim. The architect was Charles Garnier, and Gustave Eiffel designed the main dome. In 1886 the largest refracting (i.e., with an objective lens rather than a mirror) telescope in the World made its debut at Nice Observatory, the ''Grand Lunette.'' Description The refractor telescope made by Henry and Gautier became operational around 1886–1887, was the largest in a privately funded observatory, and the first at such high altitude ( above sea level). It was slightly bigger in aperture, several metres longer, and located at a higher altitude than the new (1895) at Pulkovo observatory in the Russian Empire, and the at Vienna Observatory (completed early 1880s). In the records for the largest refracting telescopes all three were outperformed by the refractor installed at ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meudon Great Refractor
Meudon Great Refractor (also known as the ''Grande Lunette'') is a double telescope with lenses (83 cm + 62 cm), in Meudon, France. It is a twin refracting telescope built in 1891, with one visual and one photographic, on a single square-tube together on an equatorial mount, inside a dome. The Refractor was built for the Meudon Observatory, and is the largest double doublet (twin achromat) refracting telescope in Europe, but about the same size as several telescopes in this period, when this style of telescope was popular. Other large telescopes of a similar type include the James Lick telescope (91.4), Potsdam Great Refractor (80+50 cm), and the Greenwich 28 inch refractor (71.1 cm). Institutionally it was part of the Meudon Observatory, which later became integrated with the Paris observatory. The Great Refractor was used for research well into the 1980s, after nearly a century of use. In the 21st century it was renovated and re-opened for public outreach. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parc Montsouris
Parc Montsouris is a public park situated in southern Paris, France. Located in the 14th arrondissement, it was officially inaugurated in 1875 after an early opening in 1869. Parc Montsouris is one of the four large urban public parks, along with the Bois de Boulogne, the Bois de Vincennes and the Parc des Buttes Chaumont, created by Emperor Napoleon III and his prefect of the Seine, Georges-Eugène Haussmann, at each of the cardinal points of the compass around the city, in order to provide green space and recreation for the rapidly growing population of Paris. The park is 15.5 hectares in area, designed as an English landscape garden by Jean-Charles Adolphe Alphand.Paris portal: Principaux parcs: Parc Montsouris The park contains a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nikolaos Ch
Nikolaos ( el, Νικόλαος, ') is a common Greek given name which means "Victor of People", a compound of νίκη '' nikē'' 'victory' and λαός laos' 'people'. The connotation is "people's champion" or "conqueror of people". The English form is Nicholas. In the bible, this is the name of a proselyte of Antioch and one of the seven deacons of the church at Jerusalem. People with first name Nikolaos In sports: * Nikolaos Andreadakis, Greek athlete * Nikolaos Andriakopoulos, Greek gymnast * Nikolaos Balanos, Greek architect * Nikolaos Dorakis, Greek shooter * Nikolaos Georgantas (1880-1958), Greek athlete * Nikolaos Georgeas, former Greek football player who last played for AEK Athens FC * Nikolaos Giantsopoulos (born 1994), Canadian soccer player * Nikolaos Kaklamanakis, Greek gold-medal winner who lit the Olympic torch in the opening ceremony of the 2004 Summer Olympics * Nikolaos Levidis, Greek shooter * Nikolaos Lyberopoulos (b. 1975), Greek football player * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vassilios Lakon
Vassilios Lakon ( el, Βασίλειος Λάκων or el, Βασιλείου Ι Λάκωνος, 1831–1900) was an astronomer, mathematician, experimental physicist, philologist, author, and professor. He was a pioneer in 19th-century Greek geometry. He did research in the fields of physics and mathematics. His professors were world-renowned physicist Dimitrios Stroumpos and astronomer Georgios Konstantinos Vouris. He also studied in France with Joseph Bertrand. He was exposed to the works of Joseph Liouville, Augustin-Louis Cauchy, Bernard Lamy, and Jacques Charles François Sturm. Lakon's math textbooks were used in high schools across Greece during the second half of the 19th century. Lakon was born on the island of Kea. He was from a prominent family. He was the first student to receive a doctorate degree in Mathematics from the University of Athens in 1850. He continued his post-doctoral studies in France. He returned to Greece. He introduced modern French math ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
