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Fernand Baldet
Fernand Baldet (16 March 1885 – 8 November 1964) was a French astronomer. He worked with Count Aymar de la Baume Pluvinel observing Mars from the newly built observatory on Pic du Midi in 1909. The resulting photographs, taken with the 0.5 metre (20 inch) reflecting Baillaud telescope, were so sharp that they were able to disprove Percival Lowell's claim of geometrical canals on the planet's surface. Baldet was the president of the Société astronomique de France (SAF), the French astronomical society, from 1939 to 1945. In 1946, Baldet and Charles Maurain jointly received the Prix Jules Janssen, the society's highest award. The crater Baldet on the Moon and the crater Baldet on Mars were named in his honour. Baldet was French pioneer of color photography working in Autochrome Lumière, Kodachrome and Agfacolor An Agfacolor slide dated 1937 from café in Oslo, Norway. An Agfacolor slide dated 1937 from Paris, France. An Agfacolor slide dated 1938 from Hung ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Astronomer
An astronomer is a scientist in the field of astronomy who focuses their studies on a specific question or field outside the scope of Earth. They observe astronomical objects such as stars, planets, natural satellite, moons, comets and galaxy, galaxies – in either observational astronomy, observational (by analyzing the data) or theoretical astronomy. Examples of topics or fields astronomers study include planetary science, Sun, solar astronomy, the Star formation, origin or stellar evolution, evolution of stars, or the galaxy formation and evolution, formation of galaxies. A related but distinct subject is physical cosmology, which studies the Universe as a whole. Types Astronomers usually fall under either of two main types: observational astronomy, observational and theoretical astronomy, theoretical. Observational astronomers make direct observations of Astronomical object, celestial objects and analyze the data. In contrast, theoretical astronomers create and investigate C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baldet (lunar Crater)
Baldet is a lunar impact crater that is located on the southern hemisphere on the far side of the Moon. It lies in the lava-flooded region between the craters Cori to the north, Stoney to the southwest, and the worn walled plain Minkowski to the southeast. The rim of Baldet is low and worn, but generally retains its original circular shape. There is a slight outward bulge along the northwest rim, and the western interior wall is wider than elsewhere. The flat, nearly featureless interior has been flooded by lava, and has a lower albedo than the surroundings giving is a darker hue. A smaller crater has broken into the eastern rim, leaving a gap where the two craters intersect that has been covered in lava. A similar-sized ghost crater A palimpsest , in planetary astronomy, is an ancient crater that has been degraded over time. They may also be referred to as "ghost craters", "degraded craters", "buried craters", or "pathological craters". Palimpsests have been identified on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1885 Births
Events January–March * January 3– 4 – Sino-French War – Battle of Núi Bop: French troops under General Oscar de Négrier defeat a numerically superior Qing Chinese force, in northern Vietnam. * January 4 – The first successful appendectomy is performed by Dr. William W. Grant, on Mary Gartside. * January 17 – Mahdist War in Sudan – Battle of Abu Klea: British troops defeat Mahdist forces. * January 20 – American inventor LaMarcus Adna Thompson patents a roller coaster. * January 24 – Irish rebels damage Westminster Hall and the Tower of London with dynamite. * January 26 – Mahdist War in Sudan: Troops loyal to Mahdi Muhammad Ahmad conquer Khartoum; British commander Charles George Gordon is killed. * February 5 – King Leopold II of Belgium establishes the Congo Free State, as a personal possession. * February 9 – The first Japanese arrive in Hawaii. * February 16 – Charles Dow publishes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agfacolor
An Agfacolor slide dated 1937 from café in Oslo, Norway. An Agfacolor slide dated 1937 from Paris, France. An Agfacolor slide dated 1938 from Hungary. An Agfacolor slide dated 1938 from Zakopane in Poland. An Agfacolor slide dated 1938 from Sweden. Budapest in Hungary, 1939. An Agfacolor slide dating from the early 1940s. While the colors themselves have held up well, damage visible includes dust and Newton's rings. Swedish battleship HM Pansarskepp Gustaf V (An Agfacolor slide dated until 1957). Agfacolor was the name of a series of color film products made by Agfa of Germany. The first Agfacolor, introduced in 1932, was a film-based version of their Agfa-Farbenplatte (Agfa color plate), a "screen plate" product similar to the French Autochrome. In late 1936, Agfa introduced Agfacolor Neu (New Agfacolor), a pioneering color film of the general type still in use today. The new Agfacolor was originally a reversal film used for making "slides", home movies and short do ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kodachrome
Kodachrome is the brand name for a color reversal film introduced by Eastman Kodak in 1935. It was one of the first successful color materials and was used for both cinematography and still photography. For many years Kodachrome was widely used for professional color photography, especially for images intended for publication in print media. Because of its complex processing requirements, the film was initially exclusively sold process-paid in the United States: customers had to pay Kodak for the cost of development when they bought the film, and independent photography stores were prohibited from developing Kodachrome photos. To develop the film, customers had to mail film to Kodak, who mailed the developed photos back for no additional charge. In 1954, the U.S. Department of Justice found this practice to be an uncompetitive violation of antitrust law. Kodak entered into a consent decree requiring they offer Kodachrome film for sale with and without the development fee, as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Autochrome Lumière
The Autochrome Lumière was an early color photography process patented in 1903 by the Lumière brothers in France and first marketed in 1907. Autochrome was an additive color "mosaic screen plate" process. It was the principal color photography process in use before the advent of subtractive color film in the mid-1930s. Prior to the Lumière brothers, Louis Ducos du Hauron utilized the separation technique to create colour images on paper with screen plates, producing natural colours through superimposition, which would become the foundation of all commercial colour photography. Descendants of photographer Antoine Lumière, inventors Louis and Auguste Lumière utilized Du Hauron's (1869) technique, which had already been improved upon by other inventors such as John Joly (1894) and James William McDonough (1896), making it possible to print photographic images in colour. One of the most broadly used forms of colour photography in the early twentieth century, autochrome was re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baldet (Martian Crater)
Fernand Baldet (16 March 1885 – 8 November 1964) was a French astronomer. He worked with Count Aymar de la Baume Pluvinel observing Mars from the newly built observatory on Pic du Midi in 1909. The resulting photographs, taken with the 0.5 metre (20 inch) reflecting Baillaud telescope, were so sharp that they were able to disprove Percival Lowell's claim of geometrical canals on the planet's surface. Baldet was the president of the Société astronomique de France (SAF), the French astronomical society, from 1939 to 1945. In 1946, Baldet and Charles Maurain jointly received the Prix Jules Janssen, the society's highest award. The crater Baldet on the Moon and the crater Baldet on Mars were named in his honour. Baldet was French pioneer of color photography working in Autochrome Lumière, Kodachrome and Agfacolor An Agfacolor slide dated 1937 from café in Oslo, Norway. An Agfacolor slide dated 1937 from Paris, France. An Agfacolor slide dated 1938 from Hung ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moon
The Moon is Earth's only natural satellite. It is the fifth largest satellite in the Solar System and the largest and most massive relative to its parent planet, with a diameter about one-quarter that of Earth (comparable to the width of Australia). The Moon is a planetary-mass object with a differentiated rocky body, making it a satellite planet under the geophysical definitions of the term and larger than all known dwarf planets of the Solar System. It lacks any significant atmosphere, hydrosphere, or magnetic field. Its surface gravity is about one-sixth of Earth's at , with Jupiter's moon Io being the only satellite in the Solar System known to have a higher surface gravity and density. The Moon orbits Earth at an average distance of , or about 30 times Earth's diameter. Its gravitational influence is the main driver of Earth's tides and very slowly lengthens Earth's day. The Moon's orbit around Earth has a sidereal period of 27.3 days. During each synodic period ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Impact Crater
An impact crater is a circular depression in the surface of a solid astronomical object formed by the hypervelocity impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal collapse, impact craters typically have raised rims and floors that are lower in elevation than the surrounding terrain. Lunar impact craters range from microscopic craters on lunar rocks returned by the Apollo Program and small, simple, bowl-shaped depressions in the lunar regolith to large, complex, multi-ringed impact basins. Meteor Crater is a well-known example of a small impact crater on Earth. Impact craters are the dominant geographic features on many solid Solar System objects including the Moon, Mercury, Callisto, Ganymede and most small moons and asteroids. On other planets and moons that experience more active surface geological processes, such as Earth, Venus, Europa, Io and Titan, visible impact craters are less common because they become eroded ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Count Aymar De La Baume Pluvinel
Count Aymar Eugène de la Baume Pluvinel (6 November 1860 – 18 July 1938) was a French astronomer and professor in the ''Grandes écoles SupOptique'' (''École supérieure d'optique''). He belonged to an old noble family, whose most famous descendant was Antoine de Pluvinel, King Louis XIII's master of equitation. He was a pioneer of astrophotography on the French expedition to Haiti to observe the transit of Venus in 1882 and on several French expeditions to observer solar eclipses. He was a member of the Société Astronomique de France from 1889 and its president from 1913 to 1919. He was awarded the Valz Prize in 1909 by the French Academy of Sciences. In 1923, he received the Prix Jules Janssen, the highest award of the Société astronomique de France The Société astronomique de France (SAF; ), the French astronomical society, is a non-profit association in the public interest organized under French law (Association loi de 1901). Founded by astronomer Camille Flamm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prix Jules Janssen
The Prix Jules Janssen is the highest award of the Société astronomique de France (SAF), the French astronomical society. This annual prize is given to a professional French astronomer or to an astronomer of another nationality in recognition of astronomical work in general, or for services rendered to Astronomy. The first recipient of the prize was Camille Flammarion, the founder of the Société astronomique de France, in 1897. The prize has been continuously awarded since then with the exception of the two World Wars. Non-French recipients have come from various countries including the United States, the United Kingdom, Canada, Switzerland, the Netherlands, Germany, Belgium, Sweden, Italy, Spain, Hungary, India, the former Czechoslovakia, and the former Soviet Union. It was established by the French astronomer Pierre Jules César Janssen (known as Jules Janssen) during his tenure as president of SAF from 1895 to 1897. Janssen announced the creation of the new prize at a meet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Société Astronomique De France
The Société astronomique de France (SAF; ), the French astronomical society, is a non-profit association in the public interest organized under French law (Association loi de 1901). Founded by astronomer Camille Flammarion in 1887, its purpose is to promote the development and practice of astronomy. History SAF was established by Camille Flammarion and a group of 11 persons on 28 January 1887 in Flammarion's apartment at 16 rue Cassini, 75014 Paris, close to the Paris Observatory. Open to all, SAF includes both professional and amateur astronomers as members, from France and abroad.Ferlet R. (2003) "The Société Astronomique de France in the Astronomical Landscape: Evolution and Prospects." In: ''Organizations and Strategies in Astronomy''. Astrophysics and Space Science Library, vol 296. Springer, Dordrecht. Its objective was defined at the time of its establishment as: "A Society is founded with the aim to bring together people involved practically or theoretically in As ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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