Galileo Galilei (1564-1642) was an Italian mathematician, physicist, astronomer, and natural philosopher. He created a superior telescope with which he made new observations of the night sky, notably that the surface of the Moon has mountains, that Jupiter has four satellite moons, and that the sunspots of the Sun, under careful observation, reveal that it is a moving sphere.
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Definition
Timeline
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1564 - 1641Life of the scientist Galileo Galilei.
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15 Feb 1564Galileo Galilei is born in Pisa, Italy.
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1581Galileo studies medicine at the University of Pisa.
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1589Galileo is appointed professor of mathematics at the University of Pisa.
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1592Galileo is appointed professor of mathematics at the University of Padua.
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1608Galileo Galilei develops a powerful new telescope.
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1610Galileo publishes his Sidereus Nuncius (The Starry Messenger).
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1610Galileo is appointed the duke of Tuscany’s official Mathematician and Natural Philosopher.
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1612Galileo’s Discourse on Floating Bodies is published.
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1613Galileo's Letters on Sunspots is published.
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Feb 1616Galileo is admonished by Cardinal Robert Bellarmine for his pro-Copernicus writings.
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1620Four moons of Jupiter are first observed by Galileo Galilei.
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1623Galileo's The Assayer is published.
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1633Galileo is tried and found guilty of heresy fro his pro-Copernicus writings.
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1638Galileo's Discourse on Two New Sciences is published.
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8 Jan 1642Galileo dies at his home on Tuscany.
