The Universe By osanchez13 Feb 19, 1473 Birth of Copernicus. Period: Feb 19, 1473 to Jan 1, 2000 The Universe Mar 2, 1514 Copernicus wrote Report Little Commentary. Mar 3, 1541 Copernicus published a short astronomical manuscript. Feb 15, 1564 Birth of Galileo. Jan 1, 1604 Galileo's first known astronomical observation Jul 1, 1609 Galileo made a telescope three times as powerful than the Dutch. Jan 1, 1613 Galileo published Letters on Sunspots. Jan 1, 1637 Galileo wrote a book summarizing all his ideas. Jan 4, 1643 BIrth of Newton Mar 3, 1687 Newton published a book about matbematical principles of natural philosphy. Nov 20, 1889 Birth of Hubble. Jan 1, 1929 Hubble proved the universe is expanding.