when was he born?
15 February 1564
Galileo Galilei
Galileo was born in Pisa (then part of the Duchy of Florence), Italy, on 15 February 1564,
what are the four biggest moons of jupiter Io, Europa, Ganymede, and Callisto. who were they first spotted by? Galileo Galilei
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Galileo Galilei [SEP] Early life and family
Galileo was born in Pisa (then part of the Duchy of Florence), Italy, on 15 February 1564, the first of six children of Vincenzo Galilei, a lutenist, composer, and music theorist, and Giulia Ammannati, who had married in 1562. Galileo became an accomplished lutenist himself and would have learned early from his father a scepticism for established authority, the value of well-measured or quantified experimentation, an appreciation for a periodic or musical measure of time or rhythm, as well as the results expected from a combination of mathematics and experiment. Three of Galileo's five siblings survived infancy. The youngest, Michelangelo (or Michelagnolo), also became a lutenist and composer although he contributed to financial burdens during Galileo's young adulthood.