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

Egon Eiermann Biography

Egon Eiermann (Neuendorf, 1904-Baden-Baden, 1970) German architect.He was a disciple of H.Poelzig and was influenced by Mies van der Rohe.He brought the rationalist tradition to the utmost technological and functional refinement (Blumberg handkerchief factory, Merkur department store in Stuttgart).
Post a Comment
Read more

The human evolution: hominization process

The DNA of human beings only differs from the DNA of chimpanzees by 1.24%.That is, we share 98.76% of our genetic traits.The great difference between chimpanzees and humans that this small percentage, is explained through the human evolution and the main processes of hominization that our species has suffered throughout what we know as prehistory, when our ancestors They were hunters and gatherers: the skeletal changes associated with the upright position, the increase in cranial capacity and the birth of immature offspring. Article index Human evolution: hominization process The study of human evolution begins in 1859 with the publication of "The Origin of Species" by Charles Darwin , where he exposes his Evo Theory lucion, based on three fundamental premises: Different species have their origin in the evolution of a previous species. This evolution is governed by the principle of Natural Selection .Only those species that best adapt to the changes evolve. ...
Post a Comment
Read more

Heinrich Gentz Biography

Heinrich Gentz ​​ (Wroclaw, 1766-Berlin, 1811) German architect.He is one of the best exponents of the first German classicism.He looked for the relationship between the façade and the character of the buildings and between the internal layout and the use to which they were intended.
Post a Comment
Read more

Guillermo Cabrera Infante Biography

Guillermo Cabrera Infante (Gibara, Cuba, 1929) Cuban writer, nationalized British.In 1951 he founded the Cuban Cinematheque, of which he was director until General Batista ordered its closure, a work that he combined with his articles on film criticism for the magazine Carteles, which he published under the pseudonym G.Caín (1954-1960).He also directed the literary magazine Monday of Revolution, banned in 1961 by Castro.In 1966 he published his first renowned novel, Tres tristes tigres, whose experimental nature lies in the ingenious use of language in its most colloquial register and the constant play of winks and references to other literary works.He was a diplomat in Brussels, until he definitively broke with the Castro regime and settled in London.He has written other outstanding novels, such as Vista delmanecer en el tropico (1974), Exorcismos de esti (l) o (1976) and essays such as Vidas para leerlas (1998).In 1998 he received the Cervantes Prize.
Post a Comment
Read more

Heinrich bullinger Biography

Heinrich Bullinger (Bremgarten, 1504-Zurich, 1575) German Protestant theologian.On the death of Zwingli and expelled by the Catholics, he took refuge in Zurich.He wrote the first and second Helvetic Confession of Faith (1536 and 1566).
Post a Comment
Read more

Space, change and permanence ... elements to understand history

In some of our latest articles we have analyzed different aspects of knowledge construction historical .In the latter post we have to reflect on the historical categories of " space ", " change " and " permanence " and its importance to sharpen our understanding of the history . Old Map of Colonia del Sacramento , disputed by Portuguese and Spanish for its strategic location in the Rio de la Plata As we know the History studies human societies in the past .Y of course, these societies lived in a territory ( space ) in particular, so whenever we start studying a society of the past we must place it in space and time. The space is a very important aspect e to study the History. Each territory has its own characteristics that can be decisive for understanding many aspects of a society .For example: what economic production does it do, trade routes, the distribution of the population, the strategies in wars, etc.In addition, soc...
Post a Comment
Read more

Hugo Wast Biography

Hugo Wast (Córdoba, 1883-Buenos Aires, 1962) Pseudonym of the Argentine novelist Gustavo Martínez Zuviría, one of the most discussed Argentine writers of the 20th century.Of some of his novels, such as Flor de durazno (1911), taken to the big screen in what was Carlos Gardel's acting debut, more than one hundred thousand copies were sold, and many of them translations have been made in up to eight languages; however, the criticism is generally negative: some historians of Spanish-American literature go so far as to dispense with his name; others even affirm that their work lacks literary value. Hugo Wast, one of the most widely read Spanish-speaking writers in the world, became a lawyer at the Universidad del Litoral (Santa Fe), was a professor of Economics at said University and directed the National Library, in Buenos Aires, from 1931 to 1955.Deputy to the Cortes (1916-1920) and Minister of Justice and Public Education (1943-1944), he obtained in 1922 the gold medal of the...
Post a Comment
Read more

Antonio Pitloo Biography

Antonio Pitloo (Arnhem, 1791-Naples, 1837) Dutch painter.In 1815 he settled in Naples.Together with G.Gigante, he was the founder and essential figure of the Posillipo School, and an important Italian landscape painter of the s.XIX.
Post a Comment
Read more

Antonio Ribera Biography

Antonio Ribera (Antonio Ribera y Maneja; Barcelona, ​​1873-Madrid, 1956) Spanish conductor and musicologist.In Spain he was a student of Nicolau, and in the German cities of Leipzig and Munich he studied with Felix Mottl and Hugo Riemann.Interested in Wagner's music, he translated several librettos of his operas into Spanish and contributed to founding the Associaciò Wagneriana de Barcelona along with other musicians such as Joaquín Pena, and was its director between 1901 and 1904.Ribera was also an opera director in Bayreuth, Lemberg (1905-1912), Barcelona (1912-1925) and Madrid.
Post a Comment
Read more

Emilio de Bono Biography

Emilio de Bono (Cassano de Adda, 1866-Verona, 1944) Italian military and politician.He was one of the first followers of fascism, he collaborated with the founders of the party and helped Mussolini to take power. Emilio de Bono In 1884 he joined the army as second lieutenant.He fought in the colonies and rose to the generalship during the Italian-Russian war of 1911.During the First World War he participated in the offensives against the Austrians in Gorzia (1916) and Grappa (October 1818).After the war he was promoted to the rank of brigadier general. Along with Italo Balbo, Emilio de Bono was one of the organizers of the fascist movement.In 1922 he was part of the quadrumvirate that organized the March on Rome, a show of force by the fascists that led to the appointment of Mussolini as prime minister and the establishment of the fascist regime in Italy.He actively participated in the fascist movement as chief of police and commander of the Fascist Militia.He was appointed ...
Post a Comment
Read more