Galileo Galilei free essay sample

Born: 15 Feb 1564 in Pisa ( now in Italy ) Died: 8 Jan 1642 in Arcetri ( near Florence ) ( now in Italy ) Galileo Galilei s parents were Vincenzo Galilei and Guilia Ammannati. Vincenzo, who was born in Florence in 1520, was a instructor of music and a all right luting participant. After analyzing music in Venice he carried out experiments on strings to back up his musical theories. Guilia, who was born in Pescia, married Vincenzo in 1563 and they made their place in the countryside near Pisa. Galileo was their first kid and spent his early old ages with his household in Pisa. In 1572, when Galileo was eight old ages old, his household returned to Florence, his male parent s place town. However, Galileo remained in Pisa and lived for two old ages with Muzio Tedaldi who was related to Galileo s female parent by matrimony. When he reached the age of 10, Galileo left Pisa to fall in his household in Florence and there he was tutored by Jacopo Borghini. We will write a custom essay sample on Galileo Galilei or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Once he was old plenty to be educated in a monastery, his parents sent him to the Camaldolese Monastery at Vallombrosa which is situated on a magnificent forested hillside 33 km sou-east of Florence. The Camaldolese Order was independent of the Benedictine Order, dividing from it in about 1012. The Order combined the lone life of the anchorite with the rigorous life of the monastic and shortly the immature Galileo found this life an attractive 1. He became a novitiate, meaning to fall in the Order, but this did non delight his male parent who had already decided that his eldest boy should go a medical physician. Vincenzo had Galileo return from Vallombrosa to Florence and give up the thought of fall ining the Camaldolese order. He did go on his schooling in Florence, nevertheless, in a school run by the Camaldolese monastics. In 1581 Vincenzo sent Galileo back to Pisa to populate once more with Muzio Tedaldi and now to inscribe for a medical grade at the University of Pisa. Although the thought of a medical calling neer seems to hold appealed to Galileo, his male parent s want was a reasonably natural one since there had been a distinguished doctor in his household in the old century. Galileo neer seems to hold taken medical surveies earnestly, go toing classs on his existent involvements which were in mathematics and natural doctrine. His mathematics instructor at Pisa was Filippo Fantoni, who held the chair of mathematics. Galileo returned to Florence for the summer holidaies and there continued to analyze mathematics. In the twelvemonth 1582-83 Ostilio Ricci, who was the mathematician of the Tuscan Court and a former student of Tartaglia, taught a class on Euclid s Elementss at the University of Pisa which Galileo attended. During the summer of 1583 Galileo was back in Firenze with his household and Vincenzo encouraged him to read Galen to foster his medical surveies. However Galileo, still loath to analyze medical specialty, invited Ricci ( besides in Florence where the Tuscan tribunal spent the summer and fall ) to his place to run into his male parent. Ricci tried to carry Vincenzo to let his boy to analyze mathematics since this was where his involvements lay. Surely Vincenzo did non like the thought and resisted strongly but finally he gave manner a small and Galileo was able to analyze the plants of Euclid and Archimedes from the Italian interlingual renditions which Tartaglia had made. Of class he was still officially enrolled as a medical pupil at Pisa but finally, by 1585, he gave up this class and left without finishing his grade. Galileo began learning mathematics, foremost in private in Florence and so during 1585-86 at Sienna where he held a public assignment. During the summer of 1586 he taught at Vallombrosa, and in this twelvemonth he wrote his first scientific book The small balance [ La Balancitta ] which described Archimedes method of happening the specific gravitations ( that is the comparative densenesss ) of substances utilizing a balance. In the undermentioned twelvemonth he travelled to Rome to see Clavius who was professor of mathematics at the Jesuit Collegio Romano at that place. A subject which was really popular with the Jesuit mathematicians at this clip was Centres of gravitation and Galileo brought with him some consequences which he had discovered on this subject. Despite doing a really favorable feeling on Clavius, Galileo failed to derive an assignment to learn mathematics at the University of Bologna. After go forthing Rome Galileo remained in contact with Clavius by correspondence and Guidobaldo del Monte was besides a regular letter writer. Surely the theorems which Galileo had proved on the Centres of gravitation of solids, and left in Rome, were discussed in this correspondence. It is besides likely that Galileo received lecture notes from classs which had been given at the Collegio Romano, for he made transcripts of such stuff which still survive today. The correspondence began around 1588 and continued for many old ages. Besides in 1588 Galileo received a esteemed invitation to talk on the dimensions and location of snake pit in Dante s Inferno at the Academy in Florence. Fantoni left the chair of mathematics at the University of Pisa in 1589 and Galileo was appointed to make full the station ( although this was merely a nominal place to supply fiscal support for Galileo ) . Not merely did he have strong recommendations from Clavius, but he besides had acquired an first-class repute through his talks at the Florence Academy in the old twelvemonth. The immature mathematician had quickly acquired the repute that was necessary to derive such a place, but there were still higher places at which he might take. Galileo spent three old ages keeping this station at the university of Pisa and during this clip he wrote De Motu a series of essays on the theory of gesture which he neer published. It is likely that he neer published this stuff because he was less than satisfied with it, and this is just for despite incorporating some of import stairss frontward, it besides contained some wrong thoughts. Possibly the most of import new thoughts which De Motu contai ns is that one can prove theories by carry oning experiments. In peculiar the work contains his of import thought that one could prove theories about falling organic structures utilizing an inclined plane to decelerate down the rate of descent. In 1591 Vincenzo Galilei, Galileo s male parent, died and since Galileo was the eldest boy he had to supply fiscal support for the remainder of the household and in peculiar have the necessary fiscal agencies to supply doweries for his two younger sisters. Bing professor of mathematics at Pisa was non good paid, so Galileo looked for a more moneymaking station. With strong recommendations from Guidobaldo del Monte, Galileo was appointed professor of mathematics at the University of Padua ( the university of the Republic of Venice ) in 1592 at a wage of three times what he had received at Pisa. On 7 December 1592 he gave his inaugural talk and began a period of 18 old ages at the university, old ages which he subsequently described as the happiest of his life. At Padua his responsibilities were chiefly to learn Euclid s geometry and criterion ( geocentric ) uranology to medical pupils, who would necessitate to cognize some uranology in order to do usage of star divination in their med ical pattern. However, Galileo argued against Aristotle s position of uranology and natural doctrine in three public lectures he gave in connexion with the visual aspect of a New Star ( now known as Kepler s supernova ) in 1604. The belief at this clip was that of Aristotle, viz. that all alterations in the celestial spheres had to happen in the lunar part near to the Earth, the kingdom of the fixed stars being lasting. Galileo used parallax statements to turn out that the New Star could non be near to the Earth. In a personal missive written to Kepler in 1598, Galileo had stated that he was a Copernican ( truster in the theories of Copernicus ) . However, no public mark of this belief was to look until many old ages subsequently. At Padua, Galileo began a long term relationship with Maria Gamba, who was from Venice, but they did non get married possibly because Galileo felt his fiscal state of affairs was non good plenty. In 1600 their first kid Virginia was born, followed by a 2nd girl Livia in the undermentioned twelvemonth. In 1606 their boy Vincenzo was born. We mentioned above an mistake in Galileo s theory of gesture as he set it out in De Motu around 1590. He was rather mistaken in his belief that the force moving on a organic structure was the comparative difference between its specific gravitation and that of the substance through which it moved. Galileo wrote to his friend Paolo Sarpi, a all right mathematician who was consultor to the Venetian authorities, in 1604 and it is clear from his missive that by this clip he had realised his error. In fact he had returned to work on the theory of gesture in 1602 and over the undermentioned two old ages, through his survey of inclined planes and the pendulum, he had formulated the right jurisprudence of falling organic structures and had worked out that a missile follows a parabolic way. However, these celebrated consequences would non be published for another 35 old ages. In May 1609, Galileo received a missive from Paolo Sarpi stating him about a field glass that a Dutchman had shown in Venice. Galileo wrote in the Starry Messenger ( Sidereus Nuncius ) in April 1610: Approximately 10 months ago a study reached my ears that a certain Fleming had constructed a field glass by agencies of which seeable objects, though really distant from the oculus of the perceiver, were clearly seen as if nearby. Of this truly singular consequence several experiences were related, to which some individuals believed while other denied them. A few yearss subsequently the study was confirmed by a missive I received from a Frenchman in Paris, Jacques Badovere, which caused me to use myself wholeheartedly to look into agencies by which I might get at the innovation of a similar instrument. This I did shortly afterwards, my footing being the philosophy of refraction. From these studies, and utilizing his ain proficient accomplishments as a mathematician and as a craftsman, Galileo began to do a series of telescopes whose optical public presentation was much better than that of the Dutch instrument. His first telescope was made from available lenses and gave a magnification of approximately four times. To better on this Galileo learned how to crunch and smooth his ain lenses and by August 1609 he had an instrument with a magnification of around eight or nine. Galileo instantly saw the commercial and military applications of his telescope ( which he called a perspicillum ) for ships at sea. He kept Sarpi informed of his advancement and Sarpi arranged a presentation for the Venetian Senate. They were really impressed and, in return for a big addition in his wage, Galileo gave the exclusive rights for the industry of telescopes to the Venetian Senate. It seems a peculiarly good move on his portion since he must hold known that such rights were nonmea ningful, peculiarly since he ever acknowledged that the telescope was non his innovation! By the terminal of 1609 Galileo had turned his telescope on the dark sky and began to do singular finds. Swerdlow writes ( see [ 16 ] ) : In approximately two months, December and January, he made more finds that changed the universe than anyone has of all time made before or since. The astronomical finds he made with his telescopes were described in a short book called the Starry Messenger published in Venice in May 1610. This work caused a esthesis. Galileo claimed to hold seen mountains on the Moon, to hold proved the Milky Way was made up of bantam stars, and to hold seen four little organic structures revolving Jupiter. These last, with an oculus to acquiring a place in Florence, he rapidly named the Medicean stars . He had besides sent Cosimo de Medici, the Grand Duke of Tuscany, an first-class telescope for himself. The Venetian Senate, possibly gaining that the rights to fabricate telescopes that Galileo had given them were worthless, froze his wage. However he had succeeded in affecting Cosimo and, in June 1610, merely a month after his celebrated small book was published, Galileo resigned his station at Padua and became Chief Mathematician at the University of Pisa ( without any teaching responsibilities ) and Mathematician and Philosopher to the Grand Duke of Tuscany. In 1611 he visited Rome where he was treated as a prima famous person ; the Collegio Romano put on a expansive dinner with addresss to honor Galileo s singular finds. He was besides made a member of the Accademia dei Lincei ( in fact the 6th member ) and this was an honor which was particularly of import to Galileo who signed himself Galileo Galilei Linceo from this clip on. While in Rome, and after his return to Florence, Galileo continued to do Ob servations with his telescope. Already in the Starry Messenger he had given unsmooth periods of the four Moons of Jupiter, but more precise computations were surely non easy since it was hard to place from an observation which Moon was I, which was II, which III, and which IV. He made a long series of observations and was able to give accurate periods by 1612. At one phase in the computations he became really puzzled since the information he had recorded seemed inconsistent, but he had forgotten to take into history the gesture of the Earth round the Sun. Galileo foremost turned his telescope on Saturn on 25 July 1610 and it appeared as three organic structures ( his telescope was non good plenty to demo the rings but made them look as lobes on either side of the planet ) . Continued observations were perplexing so to Galileo as the organic structures on either side of Saturn vanished when the ring system was edge on. Besides in 1610 he discovered that, when seen in the telescope, the planet Venus showed stages like those of the Moon, and hence must revolve the Sun non the Earth. This did non enable one to make up ones mind between the Copernican system, in which everything goes round the Sun, and that proposed by Tycho Brahe in which everything but the Earth ( and Moon ) goes round the Sun which in bend goes round the Earth. Most uranologists of the clip in fact favoured Brahe s system and so separating between the two by experiment was beyond the instruments of the twenty-four hours. However, Galileo knew that all his finds were gro unds for Copernicanism, although non a cogent evidence. In fact it was his theory of falling organic structures which was the most important in this regard, for oppositions of a traveling Earth argued that if the Earth rotated and a organic structure was dropped from a tower it should fall behind the tower as the Earth rotated while it fell. Since this was non observed in pattern this was taken as strong grounds that the Earth was stationary. However Galileo already knew that a organic structure would fall in the ascertained mode on a revolving Earth. Other observations made by Galileo included the observation of maculas. He reported these in Discourse on drifting organic structures which he published in 1612 and more to the full in Letterss on the maculas which appeared in 1613. In the undermentioned twelvemonth his two girls entered the Franciscan Convent of St Matthew outside Florence, Virginia taking the name Sister Maria Celeste and Livia the name Sister Arcangela. Since they had been born outside of matrimony, Galileo believed that they themselves should neer get married. Although Galileo put frontward many radical right theories, he was non right in all instances. In peculiar when three comets appeared in 1618 he became involved in a contention sing the nature of comets. He argued that they were near to the Earth and caused by optical refraction. A serious effect of this unfortunate statement was that the Jesuits began to see Galileo as a unsafe opposition. Despite his private support for Copernicanism, Galileo tried to avoid contention by non doing public statements on the issue. However he was drawn into the contention through Castelli who had been appointed to the chair of mathematics in Pisa in 1613. Castelli had been a pupil of Galileo s and he was besides a protagonist of Copernicus. At a meeting in the Medici castle in Florence in December 1613 with the Grand Duke Cosimo II and his female parent the Grand Duchess Christina of Lorraine, Castelli was asked to explicate the evident contradictions between the Copernican theory and Holy Scripture. Castelli defended the Copernican place smartly and wrote to Galileo afterwards stating him how successful he had been in seting the statements. Galileo, less convinced that Castelli had won the statement, wrote Letter to Castelli to him reasoning that the Bible had to be interpreted in the visible radiation of what scientific discipline had shown to be true. Galileo had several oppositions i n Florence and they made sure that a transcript of the Letter to Castelli was sent to the Inquisition in Rome. However, after analyzing its contents they found little to which they could object. The Catholic Church s most of import figure at this clip in covering with readings of the Holy Scripture was Cardinal Robert Bellarmine. He seems at this clip to hold seen small ground for the Church to be concerned sing the Copernican theory. The point at issue was whether Copernicus had merely put frontward a mathematical theory which enabled the computation of the places of the celestial organic structures to be made more merely or whether he was suggesting a physical world. At this clip Bellarmine viewed the theory as an elegant mathematical one which did non endanger the established Christian belief sing the construction of the existence. In 1616 Galileo wrote the Letter to the Grand Duchess which smartly attacked the followings of Aristotle. In this work, which he addressed to the Grand Duchess Christina of Lorraine, he argued strongly for a non-literal reading of Holy Scripture when the actual reading would belie facts about the physical universe proved by mathematical scientific discipline. In this Galileo stated rather clearly that for him the Copernican theory is non merely a mathematical calculating tool, but is a physical world: I hold that the Sun is located at the Centre of the revolutions of the celestial eyeball and does non alter topographic point, and that the Earth rotates on itself and moves around it. Furthermore I confirm this position non merely by rebuting Ptolemy s and Aristotle s statements, but besides by bring forthing many for the other side, particularly some pertaining to physical effects whose causes possibly can non be determined in any other manner, and other astronomical finds ; these finds clearly confute the Ptolemaic system, and they agree laudably with this other place and confirm it. Pope Paul V ordered Bellarmine to hold the Sacred Congregation of the Index make up ones mind on the Copernican theory. The cardinals of the Inquisition met on 24 February 1616 and took grounds from theological experts. They condemned the instructions of Copernicus, and Bellarmine conveyed their determination to Galileo who had non been personally involved in the test. Galileo was forbidden to keep Copernican positions but ulterior events made him less concerned about this determination of the Inquisition. Most significantly Maffeo Barberini, who was an supporter of Galileo, was elected as Pope Urban VIII. This happened merely as Galileo s book Il saggiatore ( The Assayer ) was about to be published by the Accademia dei Lincei in 1623 and Galileo was speedy to give this work to the new Pope. The work described Galileo s new scientific method and contains a celebrated quotation mark sing mathematics: Doctrine is written in this expansive book, the existence, which stands continually unfastened to our regard. But the book can non be understood unless one first learns to grok the linguistic communication and read the characters in which it is written. It is written in the linguistic communication of mathematics, and its characters are trigons, circles, and other geometric figures without which it is humanly impossible to understand a individual word of it ; without these one is rolling in a dark maze. Pope Urban VIII invited Galileo to papal audiences on six occasions and led Galileo to believe that the Catholic Church would non do an issue of the Copernican theory. Galileo, hence, decided to print his positions believing that he could make so without serious effects from the Church. However by this phase in his life Galileo s wellness was hapless with frequent turns of terrible unwellness and so even though he began to compose his celebrated Dialogue in 1624 it took him six old ages to finish the work. Galileo attempted to obtain permission from Rome to print the Dialogue in 1630 but this did non turn out easy. Finally he received permission from Florence, and non Rome. In February 1632 Galileo published Dialogue Refering the Two Chief Systems of the World Ptolemaic and Copernican. It takes the signifier of a duologue between Salviati, who argues for the Copernican system, and Simplicio who is an Aristotelean philosopher. The flood tide of the book is an statement by Salviati that the Earth moves which was based on Galileo s theory of the tides. Galileo s theory of the tides was wholly false despite being postulated after Kepler had already put frontward the right account. It was unfortunate, given the singular truths the Dialogue supported, that the statement which Galileo thought to give the strongest cogent evidence of Copernicus s theory should be wrong. Shortly after publication of Dialogue Refering the Two Chief Systems of the World Ptolemaic and Copernican the Inquisition banned its sale and ordered Galileo to look in Rome before them. Illness prevented him from going to Rome until 1633. Galileo s accusal at the test which followed was that he had breached the conditions laid down by the Inquisition in 1616. However a different version of this determination was produced at the test instead than the one Galileo had been given at the clip. The truth of the Copernican theory was non an issue hence ; it was taken as a fact at the test that this theory was false. This was logical, of class, since the opinion of 1616 had declared it wholly false. Found guilty, Galileo was condemned to lifelong imprisonment, but the sentence was carried out slightly sympathetically and it amounted to house apprehension instead than a prison sentence. He was able to populate foremost with the Archbishop of Siena, so subsequently to return to his place in Arcetri, near Florence, but had to pass the remainder of his life watched over by officers from the Inquisition. In 1634 he suffered a terrible blow when his girl Virginia, Sister Maria Celeste, died. She had been a great support to her male parent through his unwellnesss and Galileo was shattered and could non work for many months. When he did pull off to re-start work, he began to compose Discourses and mathematical presentations refering the two new scientific disciplines. After Galileo had completed work on the Discourses it was smuggled out of Italy, and taken to Leyden in Holland where it was published. It was his most strict mathematical work which treated jobs on drift, minutes, and Centres of gravitation. Much of this work went back to the unpublished thoughts in De Motu from around 1590 and the betterments which he had worked out during 1602-1604. In the Discourses he developed his thoughts of the inclined plane authorship: I assume that the velocity acquired by the same movable object over different dispositions of the plane are equal whenever the highs of those planes are equal. He so described an experiment utilizing a pendulum to verify his belongings of inclined planes and used these thoughts to give a theorem on acceleration of organic structures in free autumn: The clip in which a certain distance is traversed by an object traveling under unvarying acceleration from remainder is equal to the clip in which the same distance would be traversed by the same movable object traveling at a unvarying velocity of one half the maximal and concluding velocity of the old uniformly accelerated gesture. After giving farther consequences of this type he gives his celebrated consequence that the distance that a organic structure moves from remainder under unvarying acceleration is relative to the square of the clip taken. One would anticipate that Galileo s apprehension of the pendulum, which he had since he was a immature adult male, would hold led him to plan a pendulum clock. In fact he merely seems to hold thought of this possibility near the terminal of his life and around 1640 he did plan the first pendulum clock. Galileo died in early 1642 but the significance of his clock design was surely realised by his boy Vincenzo who tried to do a clock to Galileo s program, but failed. It was a sad terminal for so great a adult male to decease condemned of unorthodoxy. His will bespeak that he wished to be buried beside his male parent in the household grave in the Basilica of Santa Croce but his relations feared, rather justly, that this would arouse resistance from the Church. His organic structure was concealed and merely placed in a all right grave in the church in 1737 by the civil governments against the wants of many in the Church. On 31 October 1992, 350 old ages after Galileo s decease, Pope John Paul II gave an reference on behalf of the Catholic Church in which he admitted that mistakes had been made by the theological advisers in the instance of Galileo. He declared the Galileo instance closed, but he did non acknowledge that the Church was incorrect to convict Galileo on a charge of unorthodoxy because of his belief that the Earth rotates round the Sun. J J OConnor and E F Robertson