Skip to main content

Edmund halley Biography

Edmund Halley

(Edmund or Edmond Halley; London, 1656-Greenwich, Great Britain, 1742) English astronomer.He was the first to catalog the stars in the southern sky, in his work Catalogus stellarum australium .In 1682 he observed and calculated the orbit of the comet that bears his name, and announced his return at the end of 1758, according to a theory of his that defended the existence of elliptical path comets associated with the solar system.In the most important of his works, Synopsis astronomiae cometicae (1705), he applied Newton's laws of motion to all available data on comets.Among other contributions in the field of astronomy, he demonstrated the existence of proper motion in stars, which reduced the validity of the oldest observations, and studied the complete revolution of the Moon over a period of eighteen years.His Astronomical Tables , on which he worked until his death, were valid for many years.

Edmund Halley

Contributor From Newton in his works on the gravitational attraction between bodies, Edmund Halley was the first astronomer to predict the return of comets periodically near the Earth; his last name gave name to the most famous of them.From a wealthy social background, he devoted himself from his youth to mathematics and astronomy.In 1676 he embarked for the island of Santa Elena, in the South Atlantic; there he would carry out the first cataloging of the stars in the southern sky.

His work opened the doors of English scientific society to him and, on the occasion of a project to develop a theory on gravitation and the motion of astral bodies, he came into contact with Isaac Newton.The dialogue and cooperation between the two scientists led to the conception of the famous general law of gravity, which appeared in the book Philosophiae naturalis principia mathematica ( Mathematical principles of natural philosophy , 1687 ) by Newton, which Halley himself prefaced and sponsored for the editors of the work.

From 1720 until his death he was director of the Greenwich Observatory and Astronomer Royal, a prestigious position that John Flamsteed and James Bradley held before and after him.As a continuation of his works on astronomy, and applying Newton's laws, he described the parabolic orbits of a total of twenty-four comets in his book Synopsis astronomiae cometicae ( Synopsis of the astronomy of comets , 1705), and proved that the comets that had been observed in the years 1531, 1607 and 1682 were actually returns of the same comet.Of that same comet, which would later be called Halley's Comet in his honor, he predicted that it would return in the year 1758.Sixteen years after Edmund Halley's death, astronomers confirmed the complete accuracy of his prediction.

Labels:

Comments

Post a Comment

Popular posts from this blog

Hevelius [Johannes Havelke] Biography

Hevelius [Johannes Havelke] (Danzig, 1611- id. , 1687) German astronomer.He drew up a first lunar map, published under the name Selenography (1647), in which he assigned names to the various features of the lunar surface and called the dark areas the sea.He determined the period of rotation of the Sun, observed its spots and discovered the faculae.In 1657 he began a catalog in which he determined the positions of 1,500 stars and that he could not finish because of a fire that destroyed his observatory (1679).
Post a Comment
Read more

José Agustín Pérez del Pulgar Biography

José Agustín Pérez del Pulgar (Madrid, 1875-1939) Physicist and Spanish Jesuit.He was professor of physics in 1897 at the Chamartín de la Rosa school in Madrid, where he founded a meteorological observatory whose bulletin he directed between 1900 and 1904.He obtained a degree in physics in 1905 and moved to Belgium, Holland and Germany, where he carried out various theology courses. José Agustín Pérez del Pulgar A student of the eminent mathematicians David Hilbert and Felix Klein at the universities of Liège and Göttingen, his interest in mathematics led him to study geometry projective, particularly in aspects related to electrostatic theory, as reflected in works such as The theory of potential and the curvature of space (1907) or Stokes's theorem and the fundamental laws of electromagnetism (1913). He was the founder of the Catholic Institute of Arts and Industries of Madrid and of the School of mechanical-electric assemblers.In an article, published in 1915, entit...
Post a Comment
Read more

Francisco Sá Carneiro Biography

Francisco Sá Carneiro (Francisco Lumbrales Sá Carneiro; Oporto, 1934-Lisbon, 1980) Portuguese politician and lawyer.Throughout his career, his membership in the National Salvation Board stands out in 1974, being a minister without portfolio in the Palma Carlos cabinet.Once the so-called Carnation Revolution ended, as secretary of the Popular Democratic Party, he got a seat that he renewed in 1976.From then on he was placed in the ranks of the Portuguese Social Democratic Party, a formation with which he triumphed in the December elections.1979, becoming Prime Minister in 1980. Sá Carneiro studied law at the University of Lisbon, joining the ranks of the Catholic Action Youth movement.It was not until 1969 that he began his career as a politician, practicing as a lawyer, meanwhile, in Porto.In the year indicated, elections were called for Marcelo Caetano, after Oliveira Salazar retired.Carneiro was unable to be elected, but Caetano counted on him, among others, to join the National...
Post a Comment
Read more

Isaac Jesus Barrera Quiroz Biography

Isaac Jesús Barrera Quiroz (Otavalo, 1884-Quito, 1970) Ecuadorian writer.He stood out for the publication of different biographies focused on characters from the colonial era such as the Ecuadorian writer, politician and diplomat Vicente Rocafuerte (1783-1847) and the liberator Simón Bolívar (1783-1830).He also stood out for his studies in the history of literature: Studies of Castilian Literature and History of Ecuadorian Literature .He directed the Ecuadorian Academy of History and was a corresponding member of the Academy of Language.
Post a Comment
Read more

Gilbert Bécaud Biography

Gilbert Bécaud (François Silly, called Gilbert Bécaud, Toulon, 1927) French singer and composer.He was a pianist for E.Piaf and, from 1963, created a new type of melodic song.He has also composed a cantata, an opera and music for the cinema.
Post a Comment
Read more

Heinrich maier Biography

Heinrich Maier (Heidenheim, 1867-Berlin, 1933) German philosopher.He produced a "critical realism", along the lines of H.Driesch.He is the author, among other works, of Aristotle's syllogistics (1896-1900) and of The philosophy of reality (1926-1935).
Post a Comment
Read more

Josep Maria de Sagarra Biography

Josep Maria de Sagarra (Josep Maria de Sagarra i Castellarnau; Barcelona, ​​1894-1961) Spanish poet, playwright and storyteller in the Catalan language who was the most popular author on the Catalan scene during the decades of 1920 and 1930.Son of a linajuda native family of the region of La Segarra, his father, Ferran de Sagarra i de Siscar, was a notable historian and archaeologist specialized in stealth.Sagarra's literary vocation was manifested from his childhood: at the age of eight he wrote verses and performed comedies at home. Josep Maria de Sagarra He was educated with the Jesuits of Barcelona; one of his teachers, Father Moreu, encouraged him in his penchant for poetry.At the age of twelve he saw his first verses published, and in 1914 his first book appeared: Primer llibre de poemes .He studied Law at the University of Barcelona: among his friends and classmates were the poets Josep Maria López-Picó and Carles Riba.It was presented to Joan Maragall, who guessed i...
Post a Comment
Read more

Jose Maria Nemesio Otaño Biography

José María Nemesio Otaño (José María Nemesio Otaño y Eguino, Azcoitia, 1880-San Sebastián, 1956) Spanish composer and musicologist, one of the essential figures in the reform of sacred music in Spain during the first half of the 20th century. He studied organ in Guipúzcoa and later counterpoint and composition with Vicente Goicoechea in Valladolid.In 1896 he entered the Society of Jesus and soon obtained the position of organist at the Loyola Basilica. In 1907 he organized the First National Congress of Sacred Music in Valladolid, and that same year he founded the magazine Hispanic Sacred Music , which, following the proposals of Pope Pius X, served to give new air to the religious music that had been performed in Spain until now. Since 1911 he was director of the choir of the Pontifical University of Comillas, which became a model of good functioning for other religious choral groups in Spain.Simultaneously, Otaño continued composing, giving classes and organizing activities...
Post a Comment
Read more