Galileo Galilei was born on 15 February 1564 in Pisa, Italy. There were six children in a family of Vincenzo Galilei and Giulia Ammannati and he was the eldest. Only four children of their family survived. His father was a noted lutenist and his work was associated with music. It is known that the youngest brother of Galileo, Michelangelo, became a lutenist too. Michelangelo was enjoined by financial worries and could not help his father with dowry for their brothers-in-law, who subsequently tried to get payment due legally. Galileo sometimes lent the money to Michelangelo to help him support his musical efforts. These circumstances enhanced Galileo’s aspiration to develop inventions and earn extra income.At the age of 17 Galileo Galilei entered the University of Pisa where he studied medicine. He also was interested in mathematics, astronomy and mechanics. In 1589 he became a professor of mathematics at the University of Pisa. From 1592 to 1610 he began to teach mathematics, astronomy and mechanics at the University of Padua.