Great Scientists By Casandra Marin Feb 19, 1473 Copernicus is Born Period: Feb 19, 1473 to Jan 1, 1970 Timespan Feb 15, 1564 Galileo 's Born Dec 1, 1609 Galileo Sees Jupiter's Moons Saw Jupiter's largest moons for the first time. Mar 1, 1610 Galileo published The Starry Messenger Based on Jupiter' s moons fidindings. Jan 1, 1613 Galileo published Letters on Sunspots Based on his observations of the Sun's dark spots. Apr 1, 1634 Galileo Died