Muḥammad ibn Jabir al-Harrani al-Battani

Muḥammad ibn Jabir al-Harrani al-Battani was Associate in Nursing Arab Muslim uranologist, astrologer, and scientist. He introduced variety of pure mathematics relations, and his Kitāb az-Zīj was oft quoted by several medieval astronomers, together with Copernicus.

Little is understood regarding al-Battānī's life beside that he was born in Harran close to Urfa, in higher Mesopotamia, that is currently in Turkey, and his father was a far-famed maker of scientific instruments.His epithet aṣ-Ṣabi’ suggests that among his ancestry were members of the Sabian sect; but, his full name indicates that he was Muslim.Some western historians state that he's of noble origin, like Associate in Nursing Arab blue blood, however ancient Arabic biographers build no mention of this.He lived and worked in ar-Raqqah, a town in north central Syrian Arab Republic. One of al-Battānī's known achievements in uranology was the determination of the equinoctial year as being three hundred and sixty five days, 5 hours, forty six minutes and twenty four seconds.

Al-Battānī discovered that the direction of the Sun's apogee, as recorded by Ptolemy, was dynamical.(In trendy Copernican terms this can be as a result of the dynamical direction of the eccentricity vector of the Earth's orbit). He conjointly introduced, most likely severally of the fifth century Indian uranologist Aryabhata, the employment of sines in calculation, and part that of tangents.He conjointly calculated the values for the precession of the equinoxes (54.5" each year, or 1° in sixty six years) and also the obliquity of the great circle (23° 35').He used a homogenous rate for precession in his tables, selecting to not adopt the idea of dread attributed to his colleague Thabit ibn Qurra. Al-Battānī's work is taken into account instrumental within the development of science and uranology.Copernicus mentioned his financial obligation to al-Battānī and quoted him within the book that initiated the Copernican Revolution, the Delaware Revolutionibus Orbium Coelestium. Al-Battānī was oft quoted by Tycho Brahe, Riccioli, among others. astronomer and stargazer showed interest in a number of his observations,and his information continues to be utilized in geology.

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Posted in al-Battani, Astronomy, Caliphate, Copernicus, Harran, ibn Jabir, Kitāb az-Zīj, mathematics, scientist, uranologist

Association football

Association soccer, normally called soccer or football game, could be a sport contend between 2 groups of 11 players with a spherical ball. it's contend by 250 million players in over two hundred countries, creating it the world's most well-liked sport.The game is contend on an oblong field with a goal at every finish. the item of the sport is to get by mistreatment any a part of the body besides the arms and hands to induce the soccer into the opposing goal.The goalkeepers square measure solely players allowed to the touch the ball with their hands or arms whereas it's live so only in their penalty space. piece of ground players principally use their feet to strike or pass the ball, however could use their head or body part to strike the ball instead. The team that scores the foremost goals by the top of the match wins. If the score is tied at the top of the sport, either a draw is said or the sport goes into beyond regular time and/or a penalty combat reckoning on the format of the competition. The Laws of the sport were originally statute in European nation by The soccer Association in 1863. soccer is ruled internationally by the International Federation of soccer (FIFA; French: Fédération hymn American state soccer Association) that organises a tournament each four years.

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Posted in Association football, FIFA, Football, Football tournament, footie, footy, International Federation of soccer, players, soccer, the beautiful game

American football (NFL)

American soccer (known as football within the u.  s. and gridiron in another countries) may be a sport compete by 2 groups of 11 players on an oblong field one hundred twenty yards long by fifty three.33 yards wide with goalposts at every finish. The offense associate degree attempt|tries} to advance an oval ball (the

American football evolved within the u.  s., originating from the game of rugger. the primary game of yank soccer was compete on Nov six, 1869 between 2 faculty groups, Rutgers and Princeton, beneath rules resembling rugger and association football. a collection of rule changes concerned from 1880 onward by conductor Camp, the "Father of yank Football", established the snap, eleven-player groups and also the idea of downs, and later rule changes legalized the passing play, created the neutral zone and nominal the scale and form of the soccer.

American soccer as a full is that the standard|hottest|most well liked|preferred|most well-liked} sport within the United States; sport and faculty football area unit the foremost popular styles of the sport, with the opposite major levels being highschool and youth soccer. The NFL's championship game, the Super Bowl, is that the hottest single-day sporting event within the u.  s. and among the most-watched club sporting events within the world.
football) down the sector by running with or passing it. they need to advance it a minimum of 10 yards in four downs to receive a replacement set of 4 downs and continue the drive; if not, they flip over the soccer to the opposing team. Points area unit scored by advancing the ball into the opposing team's finish zone for a touchdown, kicking the ball through the opponent's goalposts for a field goal or by the defense braving the footballer within the offense's finish zone for a security. The team with the foremost points at the top of a game wins.

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Posted in 1932 Summer Olympics, American football, ball game, Football, Football field, Football helmet, gridiron, NFL, Princeton vs Rutgers, Team sport

The Sports Portal

Sport (or, within the us and Canada, sports) is all styles of competitive physical activity that, through casual or organized participation, aim to use, maintain or improve ability and supply amusement to participants. many sports exist, from those requiring solely 2 participants, through to those with many synchronic participants, either in groups or competitory as people.

Sport is mostly recognized as activities that square measure based mostly in physical strenuosity or physical deftness, with the most important major competitions like the Olympic Games admitting solely meet this definition, and alternative organizations like the Council of Europe victimization definitions precluding activities while not a physical component from classification as sports. However, variety of competitive, however non-physical, activities claim recognition as mind sports. The International Olympic Committee (through ARISF) acknowledges each chess and bridge as factual sports, and SportAccord, the international sports federation association, acknowledges 5 non-physical sports, though limits the quantity of mind games which might be admitted as sports.

Sports square measure sometimes ruled by a group of rules or customs, that serve to make sure honest competition, and permit consistent assessment of the winner. Winning are often determined by physical events like evaluation goals or crossing a line 1st, or by the determination of judges UN agency square measure evaluation parts of the sporting performance, as well as objective or subjective measures like technical performance or creative impression.

In organized sport, records of performance square measure typically unbroken, and for standard sports, this data is also wide declared or reported  in sport news. additionally, sport may be a major supply of amusement for non-participants, with spectator sports drawing massive crowds to venues, and reaching wider audiences through sports broadcasting.

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Posted in broadcasting, events, Olympic Games, Sport