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He continued in this effort until Despite his brilliance and insight, Galileo in some ways was a typical academic of the time, and suffered in some ways professors of more recent times could relate to. One was that he felt underpaid, and so was always on the lookout for additional income. He frequently tutored students and took in some to live with his family as they learned early 17th-Century science.

One thing he often contemplated was optics. He envisioned lenses that could magnify objects at great distances and could be practical aids in many ways. He mentally envisioned the first refracting telescopes without ever doing anything about them. You know — he was a busy guy. Dutch opticians produced simple lenses that could easily magnify distant objects, and much to his horror, Galileo discovered these devices were for sale as novelties.

He heard this thunderous news while he was traveling, in Venice, and was shocked to reliably receive the news that such devices were being peddled in shops and on the street in Paris. The invention of the first simple telescope is traditionally credited to German-Dutch lens maker Hans Lipperhey in Galileo had fancied creating his own small telescopes, and thought he could make considerable income from it.

Shocked by the news of available small telescopes, he hurried home to Padua. In a remarkable series of events, he spent essentially one weekend in his workshops and independently invented his own telescope, simply from what he had heard and imagined himself. The advocate of Aristotelian belief comes across as the simpleton, getting caught in his own arguments.

What Did Galileo Discover? In addition to the telescope and his numerous mathematical and scientific discoveries, in Galileo constructed a hydrostatic balance for measuring small objects. That same year, he also refined his theories on motion and falling objects, and developed the universal law of acceleration, which all objects in the universe obeyed.

He also devised a type of simple thermometer. Thermometer A simple glass-bulb thermometer known as a Galileo thermometer wasn't invented by Galileo, but was based on his understanding that the density of liquids changes based on its temperature. A thermoscope that Galileo designed or helped to design is similar to modern-day thermometers.

Text marker galileo biography: Today Galileo is a famous and

Inside the thermoscope, a liquid rises and falls in a glass tube as the temperature of the liquid rises or falls. The Copernican theory, however, challenged the doctrine of Aristotle and the established order set by the Catholic Church. InGalileo wrote a letter to a student to explain how Copernican theory did not contradict Biblical passages, stating that scripture was written from an earthly perspective and implied that science provided a different, more accurate perspective.

The letter was made public and Church Inquisition consultants pronounced Copernican theory heretical. Galileo obeyed the order for seven years, partly to make life easier and partly because he was a devoted Catholic. He allowed Galileo to pursue his work on astronomy and even encouraged him to publish it, on condition it be objective and not advocate Copernican theory.

Church reaction was swift, and Galileo was summoned to Rome. He treated the oar as a lever and correctly made the water the fulcrum. A year later, he patented a model for a pump. His pump was a device that raised water by using only one horse. Back to top Family Life Galileo was never married. However, he did have a brief relationship with Marina Gambaa woman he met on one of his many trips to Venice.

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Marina lived in Galileo's house in Padua where she bore him three children. His two daughters, Virginia and Livia, were both put in convents where they became, respectively, Sister Maria Celeste and Sister Arcangela. InGalileo moved from Padua to Florence where he took a position at the Court of the Medici family. He left his son, Vincenzio, with Marina Gamba in Padua.

Back to top Telescope Galileo invented many mechanical devices other than the pump, such as the hydrostatic balance. He also built an early microscope. Galileo's championing of Copernican heliocentrism was met with opposition from within the Catholic Church and from some astronomers. The matter was investigated by the Roman Inquisition inwhich concluded that his opinions contradicted accepted Biblical interpretations.

He spent the rest of his life under house arrest. Galileo became an accomplished lutenist himself and would have learned early from his father a skepticism for established authority. The youngest, Michelangelo or Michelagnoloalso became a lutenist and composer who added to Galileo's financial burdens for the rest of his life. Michelangelo also occasionally had to borrow funds from Galileo to support his musical endeavours and excursions.

These financial burdens may have contributed to Galileo's early desire to develop inventions that would bring him additional income. When Galileo was ten, he left Pisa to join his family in Florence, where he came under the tutelage of Jacopo Borghini. At the time, surnames were optional in Italy, and his first name had the same origin as his sometimes-family name, Galilei.

Both his given and family name ultimately derived from an ancestor, Galileo Bonaiutian important physician, professor, and politician in Florence in the 15th century. It was common for midth century Tuscan families to name the eldest son after the parents' surname. The Italian male given name "Galileo" and thence the surname "Galilei" derives from the Latin "Galilaeus", meaning "of Galilee ".

In it he made a point of quoting Acts : "Ye men of Galilee, why stand ye gazing up into heaven?

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Despite being a genuinely pious Catholic, [27] Galileo fathered three children out of wedlock with Marina Gamba. They had two daughters, Virginia born and Livia bornand a son, Vincenzo born Both girls were accepted by the convent of San Matteo in Arcetri and remained there for the rest of their lives. Livia took the name Sister Arcangela and was ill for most of her life.

Vincenzo was later legitimised as the legal heir of Galileo and married Sestilia Bocchineri. To him, it seemed, by comparison with his heartbeat, that the chandelier took the same amount of time to swing back and forth, no matter how far it was swinging.