Isaac newton and galileo galilei biographies

Galileo 15 February 1564 – 8 January 1642), was an Italian physicist, mathematician, astronomer, and philosopher who played a major role in the Scientific Revolution. His achievements includeimprovements to the telescope and consequent astronomical observations and support for Copernicanism. Galileo has been called the "father of modern observational astronomy the "father of modern physics",the"father of science", and "the Father of Modern Science".His contributions to observational astronomy include the telescopic confirmation of the phases of Venus, the discovery of the four largestsatellites of Jupiter (named the Galilean moons in his honour), and the observation and analysis of sunspots. Galileo also worked in applied science and technology, inventing an improved militarycompass and other instruments.
Galileo made a number of contributions to what is now known as technology,  Between 1595 and 1598, Galileo devised and improved a Geometric and Military Compass suitable for useby gunners and surveyors. 

Sir Isaac Newton  (25 December 1642 – 20 March 1727 4 January 1643 – 31 March 1727]) was an English physicist, mathematician, astronomer, natural philosopher,alchemist,and theologian, who has been "considered by many to be the greatest and most influential scientist who ever lived." His monograph Philosophiæ Naturalis Principia Mathematica, published in 1687, laysthe foundations for most of classical mechanics. In this work, Newton described universal gravitation and the three laws of motion, which dominated the scientific view of the physical universe for thenext three centuries. Newton showed that the motions of objects on Earth and of celestial bodies are governed by the same set of natural laws, by demonstrating the consistency between Kepler's laws ofplanetary motion and his theory of gravitation, thus removing the last doubts about heliocentrism and advancing the Scientific Revolution.
Newton built the first practical reflecting telescope and...