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Marie Bloch
Marie Cecile Bloch (1902–1970) was a French astronomer and astrophysicist. She is noted for her work on stellar spectroscopy. She was awarded the Lalande Prize by the French Academy of Sciences in 1960 for her scientific work in this field. Biography Bloch was born on 26 July 1902 in Lyon, France. She was born to a Jewish family of five children. Her father, Salomon Bloch, was a watchmaker who immigrated from Hégenheim, Switzerland. He was said to have been the guardian of Lyon's synagogue. The Blochs descended from a Jewish clan that settled in Alsace since the 17th century. Bloch's grandfather decided to move to Lyon when Alsace was occupied by the Germans after the French defeat during the Franco-Prussian War in 1871. In 1918, Bloch obtained a scholarship to study at the Ecole Technique Municipale (the City Technical School), which was established by the then mayor of Lyon, E. Herriot. She graduated two years later. She obtained a certificate in General Mathematics from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lyon
Lyon (Franco-Provençal: ''Liyon'') is a city in France. It is located at the confluence of the rivers Rhône and Saône, to the northwest of the French Alps, southeast of Paris, north of Marseille, southwest of Geneva, Switzerland, northeast of Saint-Étienne. The City of Lyon is the List of communes in France with over 20,000 inhabitants, third-largest city in France with a population of 522,250 at the Jan. 2021 census within its small municipal territory of , but together with its suburbs and exurbs the Lyon Functional area (France), metropolitan area had a population of 2,308,818 that same year, the second largest in France. Lyon and 58 suburban municipalities have formed since 2015 the Lyon Metropolis, Metropolis of Lyon, a directly elected metropolitan authority now in charge of most urban issues, with a population of 1,424,069 in 2021. Lyon is the Prefectures in France, prefecture of the Auvergne-Rhône-Alpes Regions of France, region and seat of the Departmental co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Franco-Prussian War
The Franco-Prussian War or Franco-German War, often referred to in France as the War of 1870, was a conflict between the Second French Empire and the North German Confederation led by the Kingdom of Prussia. Lasting from 19 July 1870 to 28 January 1871, the conflict was caused primarily by France's determination to reassert its dominant position in continental Europe, which appeared in question following the decisive Austro-Prussian War, Prussian victory over Austria in 1866. According to some historians, Prussian chancellor Otto von Bismarck deliberately provoked the French into declaring war on Prussia in order to induce four independent southern German states—Grand Duchy of Baden, Baden, Kingdom of Württemberg, Württemberg, Kingdom of Bavaria, Bavaria and Grand Duchy of Hesse, Hesse-Darmstadt—to join the North German Confederation. Other historians contend that Bismarck exploited the circumstances as they unfolded. All agree that Bismarck recognized the potential for new ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AG Pegasi
AG Pegasi is a symbiotic binary star in the constellation Pegasus, composed of a red giant and white dwarf which are separated by 2.5 astronomical units and complete an orbit every 818 days. It is classified as a symbiotic nova; it has undergone one extremely slow nova outburst and a smaller outburst. Initially a magnitude 9 star, AG Pegasi brightened and peaked at an apparent magnitude of 6.0 around 1885 before gradually fading to magnitude 9 in the late 20th century. Its spectrum was noted by earlier observers to resemble P Cygni. The spectrum of the hotter star has changed drastically over 160 years, leading investigators Scott Kenyon and colleagues to surmise that its hotter component, originally a white dwarf, accumulated enough material from the donor giant star to begin burning hydrogen and enlarge and brighten into an A-type white supergiant around 1850. It had this spectrum and an estimated surface temperature of around in 1900, with a likely radius 16 times t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Z Andromedae
Z Andromedae is a binary star system consisting of a red giant and a white dwarf. It is the prototype of a type of cataclysmic variable star known as symbiotic variable stars or simply Z Andromedae variables. The brightness of those stars vary over time, showing a ''quiescent'', more stable phase and then an ''active'' one with a more pronounced variability and stronger brightening and/or dimming. Binary system Z Andromedae is a binary star system. The two components have a circular orbit that takes 759 days to complete. The red giant is around twice the mass of the sun and 880 times its luminosity, but its effective temperature is only 2,800 K. The white dwarf is around a thousand times the luminosity of the sun during the quiescent phase, but up to 10 times more luminous during the active phases. Its temperature is as high as 150,000 K when quiescent, but drops below 100,000 K when active. It also spins around its rotation axis every 1,682 seconds and displays a stro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
