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Galileo Galilei

  • Feb 15, 1564

    Galileo is born

    Galileo is born to Vencenzo Galilei, a musician.
  • 1574

    Galileo moves to Florence

    Galileo and his family move to Florence, and he starts to attend the monastery of Vallombrosa
  • 1581

    Galileo enters the University of Pisa

    Galileo enters the University of Pisa to study medicine. The story is that “Galileo was in the cathedral at Vallombrosa when he observed a lamp hanging from the ceiling swaying with perfect rhythm. He was fascinated that the lamp took the same amount of time to swing no matter how large the range of swing. He later would apply his theories of pendulums to clocks.”
  • Galileo takes classes

    Galileo became fascinated in mathematics and geometry so he starts taking classes from Ostilio Ricci, a teacher in the Tuscan court.
  • Galileo leaves the University

    Galileo didn't complete his degree and is forced to leave the University due to the lack of funds. He returns to Pisa
  • Hydrostatic Balance

    Hydrostatic Balance
    Galileo publishes an essay on the Hydrostatic Balance, a device to measure the mass of objects.
  • Lecturer at the University of Pisa

    Galileo publishes a paper on the center of gravity in solids, it is because of this that he is awarded a position as lecturer at the University of Pisa.
  • Period: to

    Galileo works on his theory of motion

    Aristotle said that bodies of different weights fall at different rates. Galileo did not believe this.
  • Chair of Mathematics at the University of Padua

    Galileo applied and was awarded the chair of mathematics at the University of Padua. Where he stayed until 1610. This is where he did the majority of his work.
  • Galileo writes a letter to Johannes Kepler

    Galileo wrote a letter to Johannes Kepler saying he supported his heliocentric universe theory over Aristotle’s theory. Galileo would have published this, but was afraid of ridicule.
  • Galileo publishes his theories

    Galileo published his theories, which is now called the theory of uniform acceleration. In this theory he proved that all bodies, regardless of their weight, fall at an equal rate, when there is no friction. Also in this paper he stated that a ball thrown in the air would follow a parabolic path.
  • Galileo creates a better telescope

    Galileo heard of the invention of the telescope and made a better
    One without even looking at the design of the old one.
  • Period: to

    Galileo makes different observations about the solar system

    Galileo made many different observations about the solar system, when using his new telescope. He publishes the results he found in the 1610 book, "Sidereus Nuncius." ("The Starry Messenger")
  • Galileo leaves his position at Padua

    Galileo left his position at Padua to become the first philosopher and mathematician to the Grand Duke of Tuscany. This was probably because the Duke allowed Galileo more time to work on his projects.
  • Galileo visits Rome

    Galileo visited Rome to demonstrate the telescope.
  • Galileo writes 3 letters on his position on the heliocentric theory

    After he was so warmly accepted at Rome, Galileo wrote 3 letters to formally take his position on the heliocentric theory of the universe. His main reason for believing Kepler and Copernicus were his observations of sunspots moving around the sun.
  • Accused of heresy

    Accused of heresy
    Galileo was accused of heresy for his support of the Copernican
    Theory.
  • Period: to

    Galileo retires

    Galileo retired to his home in Bellosguardo near Florence.
  • Forbidden from teaching

     The church forbid him from teaching or advocating these theories.
  • Galileo publishes a dialogue

    Galileo publishes a dialogue
    Galileo published his great work, Dialogo sopra I due massimi sistemi del mondo, tolemaico e copernicano. In accordance with the Pope, the work was set as a conversation between two men discussing the Ptolemaic and Copernican systems.
  • Condemned for heresy

    The Pope was infuriated at the content of "Dialogo," so he places Galileo on trial for one thing after another.
  • House Arrest

    Galileo is placed under house arrest for 8 years until his death.
  • Galileo Galilei Dies

    Galileo ended up dying from a long illness.