Galileo Galilei is considered as one of the greatest contributor to the development of Science. He was physicist, astronomer, and philosopher and his best known contributions lie in the development of Telescope, first two laws of motion and also in Astronomy. He was born to a mathematician and musician father Vincenzo Galilei and his mother was Giulia Ammannati in Italy. He was the first scientist who followed the way of quantitative experiments in his research where the result was based on mathematics. He had to suffer a lot from the church for his theories.