The Universe By Gomez2578 Feb 19, 1473 Copernicus was born Period: Feb 19, 1473 to Jan 1, 2000 The Universe Mar 3, 1541 Copernicus published a short astronomical manuscript Feb 15, 1564 Galileo was born Jan 1, 1604 Galilao's first known astronomical observation Mar 3, 1613 Galileo published letters about sunspots caused by magnetic activites Jan 4, 1643 Isaac Newton was born Jan 3, 1687 Newton's publication of Mathematical Principals Mar 31, 1737 Newton died Nov 20, 1889 Edwin Hubble was born Mar 2, 1929 Hubble proves that the universe is expanding Period: Mar 3, 1941 to Mar 3, 1948 Hubble helps design the Hale Telescope Sep 28, 1953 Hubble died