7 January 1610 January 7, 2015 Author: Staff Galileo Galilei makes his first observation of the four Galilean moons. Famous Words of Inspiration..."Passion is the genesis of genius." Tony Robbins — Click here for more from Tony Robbins Related posts: 13 February 1633 14 May 1610 7 January 1797 7 January 1935 7 January 1960 Categories: History Tags: 1610, 7 January