Galileo Galilei


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.

More about: Galileo Galilei


  • 1564 - 1641
    Life of the scientist Galileo Galilei.
  • 15 Feb 1564
    Galileo Galilei is born in Pisa, Italy.
  • 1581
    Galileo studies medicine at the University of Pisa.
  • 1589
    Galileo is appointed professor of mathematics at the University of Pisa.
  • 1592
    Galileo is appointed professor of mathematics at the University of Padua.
  • 1608
    Galileo Galilei develops a powerful new telescope.
  • 1610
    Galileo publishes his Sidereus Nuncius (The Starry Messenger).
  • 1610
    Galileo is appointed the duke of Tuscany’s official Mathematician and Natural Philosopher.
  • 1612
    Galileo’s Discourse on Floating Bodies is published.
  • 1613
    Galileo's Letters on Sunspots is published.
  • Feb 1616
    Galileo is admonished by Cardinal Robert Bellarmine for his pro-Copernicus writings.
  • 1620
    Four moons of Jupiter are first observed by Galileo Galilei.
  • 1623
    Galileo's The Assayer is published.
  • 1633
    Galileo is tried and found guilty of heresy fro his pro-Copernicus writings.
  • 1638
    Galileo's Discourse on Two New Sciences is published.
  • 8 Jan 1642
    Galileo dies at his home on Tuscany.