Sir Isaac Newton By nbragg Jan 4, 1643 Born Woolsthorpe, England Apr 23, 1646 Mother leaves Isaac at the age of three Period: Aug 17, 1655 to Feb 23, 1667 Newton studies at home Develops calculus, light theory, laws of planetary motion Period: Apr 1, 1661 to May 28, 1669 Attends Cambridge University Aug 7, 1665 Cambridge University closes due to Bubonic Plague Apr 23, 1668 First Invention: Reflecting telescope Period: Jul 10, 1678 to Apr 23, 1684 Nervous breakdown; develops planetary motion Jul 5, 1687 Publishes Principia Apr 23, 1689 Elected to represent Cambridge in Parliament Period: Apr 23, 1693 to Oct 23, 1693 Suffers another nervous breakdown Jun 29, 1696 Elected Warden of the Mint Mar 3, 1703 Elected President of Royal Society Apr 10, 1705 Knighted by Queen of England Mar 20, 1727 Death