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Achille Pierre Dionis Du Séjour
Achille Pierre Dionis du Séjour (January 11, 1734 – August 22, 1794) was a French astronomer and mathematician. Electronic Enlightenment Project (2008) ''Achille Pierre Dionis Du Séjour correspondence.'' Dionis du Séjour was born in Paris and was a distant relative of surgeon and anatomist Pierre Dionis. He served as an advisor to parliament before he was appointed to the French Academy of Sciences in 1765. In 1775 he was elected a Fellow of the Royal Society. He was appointed to the Paris group for the Estates-General of 1789 and was one of the 47 who joined the Estates of the Realm that year. Dionis du Séjour died in Vernou-la-Celle-sur-Seine. Publications * ''Traité des courbes algébriques'' (Treatise on Algebraic Curves), with Mathieu-Bernard Goudin (1756) * ''Recherches sur le gnomonique et les rétrogradations des planètes'' (Research on sundials and retrograde motions of Planets), (1761) * ''Traité des mouvements apparents des corps célestes'' (Treatise on ap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dionis Du Sejour
Denise, with several spelling variations, is a female given name. Dionysus is the Greek god of wine, and the name Denise means "to be devoted to Bacchus." Feminine variants * Deneece, Denice, Deniece, Denyse: English * Denisa: Czech, Romanian, Russian, Slovak * Denise: English, French, Portuguese * Denisse: English, French * Deniz: Turkish * Dennet, Denote, Deonisia, Deonysia: Middle English * Dinisia: Portuguese * Dionycia, Dionis: Middle English * Dionise: Old French (on St. Denise's burial site) * Dionísia: Portuguese * Dionisia: Middle English, Italian, Spanish * Dionizja: Polish * Dionysia: Greek (Διονυσία), Latin, Middle English * Diot, Diota, Dye, Dyonese, Dyonisia, Dyonisya, Dyot, Dyota: Middle English Masculine variants * Dénes: Hungarian * Denis: English, French, German, Romanian, Slovak, Slovene, Czech, Russian (Денис), Serbo-Croatian language">Serbo-Croatian (also Денис) * Denijs: Middle Dutch * Deniz: Turkish language * Dêniz: Portuguese ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Members Of The French Academy Of Sciences
Member may refer to: * Military jury, referred to as "Members" in military jargon * Element (mathematics), an object that belongs to a mathematical set * In object-oriented programming, a member of a class ** Field (computer science) In data hierarchy, a field (data field) is a Variable (computer science), variable in a record (computer science), record. A record, also known as a data structure, allows logically related data to be identified by a single name. Identifying relate ..., entries in a database ** Member variable, a variable that is associated with a specific object * Limb (anatomy), an appendage of the human or animal body ** Euphemism for penis * Structural component of a truss, connected by nodes * User (computing), a person making use of a computing service, especially on the Internet * Member (geology), a component of a geological formation * Member of parliament * The Members, a British punk rock band * Meronymy, a semantic relationship in linguistics * C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
18th-century French Mathematicians
The 18th century lasted from 1 January 1701 (represented by the Roman numerals MDCCI) to 31 December 1800 (MDCCC). During the 18th century, elements of Enlightenment thinking culminated in the Atlantic Revolutions. Revolutions began to challenge the legitimacy of monarchical and aristocratic power structures. The Industrial Revolution began mid-century, leading to radical changes in human society and the environment. The European colonization of the Americas and other parts of the world intensified and associated mass migrations of people grew in size as part of the Age of Sail. During the century, slave trading expanded across the shores of the Atlantic Ocean, while declining in Russia and China. Western historians have occasionally defined the 18th century otherwise for the purposes of their work. For example, the "short" 18th century may be defined as 1715–1789, denoting the period of time between the death of Louis XIV of France and the start of the French Revoluti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
18th-century French Astronomers
The 18th century lasted from 1 January 1701 (represented by the Roman numerals MDCCI) to 31 December 1800 (MDCCC). During the 18th century, elements of Enlightenment thinking culminated in the Atlantic Revolutions. Revolutions began to challenge the legitimacy of monarchical and aristocratic power structures. The Industrial Revolution began mid-century, leading to radical changes in human society and the environment. The European colonization of the Americas and other parts of the world intensified and associated mass migrations of people grew in size as part of the Age of Sail. During the century, slave trading expanded across the shores of the Atlantic Ocean, while declining in Russia and China. Western historians have occasionally defined the 18th century otherwise for the purposes of their work. For example, the "short" 18th century may be defined as 1715–1789, denoting the period of time between the death of Louis XIV of France and the start of the French ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1794 Deaths
Events January–March * January 1 – The Stibo Group is founded by Niels Lund as a printing company in Aarhus (Denmark). * January 13 – The U.S. Congress enacts a law providing for, effective May 1, 1795, a United States flag of 15 stars and 15 stripes, in recognition of the recent admission of Vermont and Kentucky as the 14th and 15th states. A subsequent act restores the number of stripes to 13, but provides for additional stars upon the admission of each additional state. * January 21 – King George III of Great Britain delivers the speech opening Parliament and recommends a continuation of Britain's war with France. * February 4 – French Revolution: The National Convention of the French First Republic abolishes slavery. * February 8 – Wreck of the Ten Sail on Grand Cayman. * February 11 – The first session of the United States Senate is open to the public. * March 4 – The Eleventh Amendment to the United States Constit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1734 Births
Events January– March * January 8 – Salzburgers, Lutherans who were expelled by the Roman Catholic Bishop of Salzburg, Austria, in October 1731, set sail for the British Colony of Georgia in America. * February 16 – The Ostend Company, established in 1722 in the Austrian Netherlands (modern-day Belgium) to compete for trade in the West Indies (the Caribbean islands) and the East Indies (south and southeast Asia), ceases business as part of the agreement by Austria in the Second Treaty of Vienna. * March 12 – Salzburgers arrive at the mouth of the Savannah River in the British Colony of Georgia. April–June * April 25 – Easter occurs on the latest possible date (the next time is in 1886). * May 15 – Prince Charles of Spain (later King Charles III) becomes the new King of Naples and Sicily, five days after his arrival in Naples. * May 25 – Spanish forces under the command of José Carrillo de Albornoz, 1st Duke of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comet
A comet is an icy, small Solar System body that warms and begins to release gases when passing close to the Sun, a process called outgassing. This produces an extended, gravitationally unbound atmosphere or Coma (cometary), coma surrounding the nucleus, and sometimes a Comet tail, tail of gas and dust gas blown out from the coma. These phenomena are due to the effects of solar radiation and the outstreaming solar wind plasma acting upon the nucleus of the comet. Comet nuclei range from a few hundred meters to tens of kilometers across and are composed of loose collections of ice, dust, and small rocky particles. The coma may be up to 15 times Earth's diameter, while the tail may stretch beyond one astronomical unit. If sufficiently close and bright, a comet may be seen from Earth without the aid of a telescope and can Subtended angle, subtend an arc of up to 30° (60 Moons) across the sky. Comets have been observed and recorded since ancient times by many cultures and religion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apparent Retrograde Motion
Apparent retrograde motion is the apparent motion of a planet in a direction opposite to that of other bodies within its system, as observed from a particular vantage point. Direct motion or prograde motion is motion in the same direction as other bodies. While the terms ''direct'' and ''prograde'' are equivalent in this context, the former is the traditional term in astronomy. The earliest recorded use of ''prograde'' was in the early 18th century, although the term is now less common. Etymology and history The term ''retrograde'' is from the Latin word – "backward-step", the affix meaning "backwards" and "step". ''Retrograde'' is most commonly an adjective used to describe the path of a planet as it travels through the night sky, with respect to the zodiac, stars, and other bodies of the celestial canopy. In this context, the term refers to planets, as they appear from Earth, stopping briefly and reversing direction at certain times, though in reality, of course, we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Retrograde Motion
Retrograde motion in astronomy is, in general, orbital or rotational motion of an object in the direction opposite the rotation of its primary, that is, the central object (right figure). It may also describe other motions such as precession or nutation of an object's rotational axis. Prograde or direct motion is more normal motion in the same direction as the primary rotates. However, "retrograde" and "prograde" can also refer to an object other than the primary if so described. The direction of rotation is determined by an inertial frame of reference, such as distant fixed stars. In the Solar System, the orbits around the Sun of all planets and dwarf planets and most small Solar System bodies, except many comets and few distant objects, are prograde. They orbit around the Sun in the same direction as the sun rotates about its axis, which is counterclockwise when observed from above the Sun's north pole. Except for Venus and Uranus, planetary rotations around their a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sundials
A sundial is a horology, horological device that tells the time of day (referred to as civil time in modern usage) when direct sunlight shines by the position of the Sun, apparent position of the Sun in the sky. In the narrowest sense of the word, it consists of a flat plate (the ''dial'') and a gnomon, which casts a shadow onto the dial. As the Sun diurnal motion, appears to move through the sky, the shadow aligns with different hour-lines, which are marked on the dial to indicate the time of day. The ''style'' is the time-telling edge of the gnomon, though a single point or ''nodus'' may be used. The gnomon casts a broad shadow; the shadow of the style shows the time. The gnomon may be a rod, wire, or elaborately decorated metal casting. The style must be polar alignment, parallel to the axis of the Earth's rotation for the sundial to be accurate throughout the year. The style's angle from horizontal is equal to the sundial's geographical latitude. The term ''sundial'' can r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vernou-la-Celle-sur-Seine
Vernou-la-Celle-sur-Seine () is a commune in the Seine-et-Marne department in the Île-de-France region in north-central France. Vernou-la-Celle-sur-Seine is the twin town to Manorbier, in Pembrokeshire, South West Wales, and was twinned in 1981. Population Inhabitants of Vernou-la-Celle-sur-Seine are called ''Vernoucellois'' in French. Buildings The notable buildings of the commune include the Château d'Argeville. See also *Communes of the Seine-et-Marne department The following is a list of the 507 communes of the Seine-et-Marne department of France. The communes cooperate in the following intercommunalities (as of 2025): References External links Official site [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
