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Évry Schatzman
Evry Léon Schatzman (16 September 1920 – 25 April 2010) was a French scientist hailed as "the father of modern French astrophysics". Background His father, Benjamin Schatzman, was a dentist born in Tulcea, Romania, and emigrated at a young age with his family to Palestine. Schatzman began his studies at the École normale supérieure in November 1939. After the German invasion of France, Schatzman, who was Jewish, fled occupied France, arriving in Lyon in January 1942. He worked there for a year and then moved to Haute-Provence Observatory where he hid under the pseudonym Antoine Emile Louis Sellier. Career He was appointed by the Centre national de la recherche scientifique (CNRS) in autumn 1945 and received his doctorate in March 1946. He taught at Princeton University and the Copenhagen Observatory. He his mentored during his year at Princeton by Lyman Spitzer and Martin Schwarzschild and works with Bengt Strömgren in Copenhagen. He started teaching at the University o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neuilly-sur-Seine
Neuilly-sur-Seine (; 'Neuilly-on-Seine'), also known simply as Neuilly, is an urban Communes of France, commune in the Hauts-de-Seine Departments of France, department just west of Paris in France. Immediately adjacent to the city, north of the Bois de Boulogne, the area is composed of mostly select residential neighbourhoods, as well as many corporate headquarters and a handful of foreign embassies. One of the most affluent areas of France, it is the wealthiest and most expensive suburb of Paris. Together with the 16th arrondissement of Paris, 16th and 7th arrondissement of Paris, the town of Neuilly-sur-Seine forms the most affluent residential area in France. , it is the commune with the fourth highest median per capita income (€52,570 per year) in France. History Originally, Pont de Neuilly was a small hamlet under the jurisdiction of Villiers, a larger settlement mentioned in medieval sources as early as 832 and now absorbed by the commune of Levallois-Perret. It was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centre National De La Recherche Scientifique
The French National Centre for Scientific Research (, , CNRS) is the French state research organisation and is the largest fundamental science agency in Europe. In 2016, it employed 31,637 staff, including 11,137 tenured researchers, 13,415 engineers and technical staff, and 7,085 contractual workers. It is headquartered in Paris and has administrative offices in Brussels, Beijing, Tokyo, Singapore, Washington, D.C., Bonn, Moscow, Tunis, Johannesburg, Santiago de Chile, Israel, and New Delhi. Organization The CNRS operates on the basis of research units, which are of two kinds: "proper units" (UPRs) are operated solely by the CNRS, and Joint Research Units (UMRs – ) are run in association with other institutions, such as universities or INSERM. Members of Joint Research Units may be either CNRS researchers or university employees ( ''maîtres de conférences'' or ''professeurs''). Each research unit has a numeric code attached and is typically headed by a university profe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pressure Ionization
Pressure (symbol: ''p'' or ''P'') is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Gauge pressure (also spelled ''gage'' pressure)The preferred spelling varies by country and even by industry. Further, both spellings are often used ''within'' a particular industry or country. Industries in British English-speaking countries typically use the "gauge" spelling. is the pressure relative to the ambient pressure. Various units are used to express pressure. Some of these derive from a unit of force divided by a unit of area; the SI unit of pressure, the pascal (Pa), for example, is one newton per square metre (N/m2); similarly, the pound-force per square inch (psi, symbol lbf/in2) is the traditional unit of pressure in the imperial and US customary systems. Pressure may also be expressed in terms of standard atmospheric pressure; the unit atmosphere (atm) is equal to this pressure, and the torr is defined as of this ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrogen
Hydrogen is a chemical element; it has chemical symbol, symbol H and atomic number 1. It is the lightest and abundance of the chemical elements, most abundant chemical element in the universe, constituting about 75% of all baryon, normal matter. Under standard conditions, hydrogen is a gas of diatomic molecules with the chemical formula, formula , called dihydrogen, or sometimes hydrogen gas, molecular hydrogen, or simply hydrogen. Dihydrogen is colorless, odorless, non-toxic, and highly combustible. Stars, including the Sun, mainly consist of hydrogen in a plasma state, while on Earth, hydrogen is found as the gas (dihydrogen) and in molecular forms, such as in water and organic compounds. The most common isotope of hydrogen (H) consists of one proton, one electron, and no neutrons. Hydrogen gas was first produced artificially in the 17th century by the reaction of acids with metals. Henry Cavendish, in 1766–1781, identified hydrogen gas as a distinct substance and discovere ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White Dwarf
A white dwarf is a Compact star, stellar core remnant composed mostly of electron-degenerate matter. A white dwarf is very density, dense: in an Earth sized volume, it packs a mass that is comparable to the Sun. No nuclear fusion takes place in a white dwarf; what light it radiates is from its residual heat. The nearest known white dwarf is Sirius B, at 8.6 light years, the smaller component of the Sirius binary star. There are currently thought to be eight white dwarfs among the hundred star systems nearest the Sun. The unusual faintness of white dwarfs was first recognized in 1910. The name ''white dwarf'' was coined by Willem Jacob Luyten in 1922. White dwarfs are thought to be the final stellar evolution, evolutionary state of stars whose mass is not high enough to become a neutron star or black hole. This includes over 97% of the stars in the Milky Way. After the hydrogen-stellar nucleosynthesis, fusing period of a main sequence, main-sequence star of Stellar mass, lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nice Observatory
The Nice Observatory () 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 (architect), Charles Garnier, and Gustave Eiffel#Eiffel et Cie, 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meudon
Meudon () is a French Communes of France, commune located in the Hauts-de-Seine Departments of France, department in the Île-de-France Regions of France, region, on the left bank of the Seine. It is located from the Kilometre Zero, center of Paris. The city is known for many historic monuments. Geography The town of Meudon is built on the hills and valleys of the Seine. The forest of Meudon lies for the most part to the west of the town. The north-west part of Meudon, overlooking the Seine, is known as ''Bellevue'' ("beautiful view"). The neighboring communes are: Sèvres (North-west), Boulogne-Billancourt (North); Issy-les-Moulineaux (northeast), Clamart (east and southeast), Vélizy (south and southwest) and Chaville (west). The town includes several districts: Meudon-sur-Seine, Val Fleury, Meudon-Centre, Bellevue and Meudon-la-Forêt. History At Meudon, the argile plastique clay was extensively mined in the 19th century. The first fossil of the European diatryma ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Université Libre De Bruxelles
The (French language, French, ; lit. Free University of Brussels; abbreviated ULB) is a French-speaking research university in Brussels, Belgium. It has three campuses: the ''Solbosch'' campus (in the City of Brussels and Ixelles), the ''Plaine'' campus (in Ixelles) and the ''Erasmus'' campus (in Anderlecht). The Université libre de Bruxelles was formed in 1969 by the splitting of the Free University of Brussels (1834–1969), Free University of Brussels, which was founded in 1834 by the lawyer and Liberalism, liberal politician Pierre-Théodore Verhaegen. The founder aimed to establish a university independent from state and church, where academic freedom would prevail. This is still reflected in the university's motto , or "Conquering darkness through science". One of the leading Belgian universities open to Europe and the world, the ULB now has about 24,200 students, 33% of whom come from abroad, and an equally cosmopolitan staff. Name Brussels has two universities whose ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Institut D'astrophysique De Paris
The Institut d'Astrophysique de Paris (translated: Paris Institute of Astrophysics) is a research institute in Paris, France. The Institute is part of the Sorbonne University and is associated with the CNRS Centre national de la recherche scientifique. It is located at 98bis, Boulevard Arago Il in the 14th arrondissement of Paris, adjacent to the Paris Observatory. History The IAP was created in 1936 by the French ministry of education under Jean Zay, initially for the purpose of processing data received from the Observatory of Haute-Provence, which was created at the same time. Construction of the building started on 6 January 1938. On 15 June 1939, Henri Mineur became the institute's first director. IAP scientists were at first located in Paris Observatory, then in the École normale supérieure de Paris before arriving in the current building in 1944 which was finally completed in 1952. Current research The IAP includes 160 researchers, engineers, technicians, and adminis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bengt Strömgren
Bengt Georg Daniel Strömgren (21 January 1908 – 4 July 1987) was a Danish astronomer and astrophysicist. Life and career Bengt Strömgren was born in Gothenburg. His parents were Hedvig Strömgren (née Lidforss) and Elis Strömgren, who was professor of astronomy at the University of Copenhagen and director of the University Observatory in Copenhagen. Bengt grew up in the professor's mansion surrounded with scientists, assistants, observers and guests. His father paced and promoted Bengt into a life with science, and Bengt's first paper was published already at the age of 14. He graduated from high school in 1925 and enrolled at the Copenhagen university. Only two years later, he graduated in astronomy and atomic physics, and during the following two years, he completed a doctoral degree, which was evaluated with the best marks in December 1929, when he was 21 years old. He gained a great deal of useful experience from his studies in theoretical physics at Niels Bohr's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Martin Schwarzschild
Martin Schwarzschild (May 31, 1912 – April 10, 1997) was a German-American astrophysicist. The Schwarzschild criterion, for the stability of stellar gas against convention, is named after him. Biography Schwarzschild was born in Potsdam into a distinguished German Jewish academic family. His father was the physicist Karl Schwarzschild and his uncle the astrophysicist Robert Emden. His sister, Agathe Thornton, became a classics scholar in New Zealand. In line with a request in his father's will, his family moved to Göttingen in 1916. Schwarzschild studied at the University of Göttingen and took his doctoral examination in December 1936. He left Germany in 1936 for Norway and then the United States. Schwarzschild served in the US army intelligence. He was awarded the Legion of Merit and the Bronze Star for his wartime service. After returning to the US, he married fellow astronomer Barbara Cherry (1914–2008). In 1947, Martin Schwarzschild joined his lifelong friend, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lyman Spitzer
Lyman Spitzer Jr. (June 26, 1914 – March 31, 1997) was an American theoretical physicist, astronomer and mountaineer. As a scientist, he carried out research into star formation and plasma physics and in 1946 conceived the idea of telescopes operating in outer space. Spitzer invented the stellarator plasma device and is the namesake of NASA's Spitzer Space Telescope. As a mountaineer, he made the first ascent of Mount Thor, with Donald C. Morton. Early life and education Spitzer was born to a Presbyterian family in Toledo, Ohio, the son of Lyman Spitzer Sr. and Blanche Carey (née Brumback). Through his paternal grandmother, he was related to inventor Eli Whitney. Spitzer graduated from Scott High School. He then attended Phillips Academy from 1929 to 1931 and went on to Yale College, where he graduated Phi Beta Kappa in 1935 and was a member of Skull and Bones. During a year of study at St John's College, Cambridge, he was influenced by Arthur Eddington and the young ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
