4 Scientist By Nate_Perez1121 Feb 19, 1473 Copernicus was born Mar 3, 1541 Coppernicus published a short austronomical Manuscript Feb 15, 1564 bith of Galilao Jan 3, 1604 Galilao's first known astronomical observation Mar 3, 1613 Galileo published this letters about the sunspots Jan 4, 1643 Newtons birth Mar 3, 1687 Publication of Mathematical Principles of Natural Philosophy Mar 3, 1731 Newton died Nov 20, 1889 Hubble was born Period: Jan 1, 1914 to Jan 1, 1917 Hubble helped design the Hale Telescope in California Jan 1, 1929 Hubble proves that the universe is expanding Sep 28, 1953 Hubble died of a heart attack