February 18, 1564:
·birth of Galileo Galilei in the Tuscan city of Pisa
·Galilei family moves to Florence
·Galileo enrolls in the University of Pisa to pursue
a degree in medicine
·Galileo leaves the University of Pisa without having
obtained a degree
·Galileo hired as a lecturer in mathematics at the
University of Pisa
·Galileo teaches in Pisa, and reportedly makes his
famous velocity experiment, dropping objects off the leaning tower
to disprove Aristotle's theory that heavier objects fall faster
than lighter ones
·Death of Vincenzo Galilei, Galileo's father
·Galileo takes post at the University of Padua
·Galileo's first daughter, Virginia, born in Padua
·Galileo's second daughter born
·Appearance of Kepler's Nova in the sky; Galileo debates
its significance with conservative scholars.
·Birth of Galileo's third child, a son
·News of the invention of the telescope reaches Italy;
Galileo develops his own device in August.
·Galileo makes his first observations using his telescope,
discovers uneven surface of the moon.
·Galileo discovers four moons orbiting Jupiter
·Publication of Sidereus Nuncius, dedicated
to the Grand Duke of Tuscany, Cosimo II
·Galileo leaves Padua to take a new, more lucrative
position in Tuscany
·Galileo travels to Rome, where he is cordially received
by the Jesuit astronomers and Pope Paul V
·Father Tommasso Caccini attacks Galileo in sermon
in Florence, and later denounces him to the Inquisition
·Galileo goes to Rome
·Papal commission issues edict against Copernican theory;
Cardinal Bellarmine orders Galileo to cease in his support of heliocentricity
·Galileo leaves Rome
·Death of Cardinal Bellarmine
·Urban VIII becomes Pope; Galileo visits him in Rome
·Galileo's treatise on comets, The Assayer, is
published with Urban VIII's blessing
·Galileo works on his Dialogue Concerning the
Two Chief World Systems from his home outside Florence
Dialogue Concerning the Two Chief World Systems published
in Florence, with tentative Papal approval
·Inquisition bans further printing of the Dialogue
September 23, 1632:
·Galileo summoned to Rome
February 13, 1633:
·Galileo arrives in Rome
April 12, 1633:
·Galileo interrogated for the first time. Afterwards,
he is imprisoned in the Vatican for three weeks.
April 30, 1633:
·Galileo interrogated again, and allowed to return
to the home of the Tuscan ambassador
May 10, 1633:
·Third interrogation; Galileo begs for mercy.
June 21, 1633:
·Final interrogation. The following day, Galileo is
officially charged with heresy; he is forced to confess his errors,
renounce the Copernican system, and accept the Church's judgment.
He is sentenced to imprisonment "for a period determinable at
·Galileo is allowed to return to the village of Arcetri,
outside Florence, where he lives under house arrest
April 2, 1634:
·Death of Virginia, now Sister Maria Celeste.
·Galileo's eyesight begins to fail.
·Galileo's Dialogues Concerning Two New Sciences is
published in Holland. John Milton visits Galileo in Arcetri.
January 8, 1642:
·Death of Galileo
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