Sci-History

• Ptolemy writes his book Almagest which states that the Sun and other planets orbit the Earth


  € 150 AD
• Aglaonike, a woman astronomer lives

  c 150 BC
• Aristotle lives. Many of his ideas are wrong but they dominate science for the next 2,000 years


  384-322 BC
• Tycho Brahe observes a supernova

  1572
• Johannes Kepler publishes a book on optics


  1604
• Otto von Guericke invents an air pump


  1650
• Kepler publishes a 3rd law of planetary motion


  1619
• Robert Hooke describes cells

  1665
• Galileo publishes Dialogue Concerning the Two Chief World Systems


  1632
• Petrus van Musschenbroek invents the Leyden jar, a high voltage electric ch


  1746
• Henry Cavendish isolates hydrogen


  1766
• Henry Cavendish measures the density of the Earth


  1798
• John Goodricke discovers variable stars


  1784
• Thomas Francois Dalibard proves lightning is a form of electricity


  1752
• The first asteroid is discovered-Ceres (Giuseppe Piazzi)


  1801
• Isaac Newton publishes a book about optics


  1704
• Joseph Priestley discovers oxygen


  1774
• Friedrich Wohler produces urea, a substance formed by the breakdown of protein in the liver


  1828
• Empedocles lives. He says the world is made of 4 elements: earth, fire, water, and air


  494-434 BC
• William Harvey publishes his discovery of how blood circulates around the body


  1628
• William Gilbert shows that the Earth is a magnet


  1600
• The doctor Galen lives. His ideas about the human body dominated medicine for the next 1,500 years


  130-210 AD
• Eratosthenes lives. He measures the circumference of the Earth


  276-194 BC
• Copernicus publishes his theory that the Earth orbits the Sun

  1543
• Isaac Newton publishes Principia Mathematica


  1657
• French chemist Antoine Lavoisier lives


  1743-1794
• Evangelista Torricelli invents the barometer measures air pressure


  1643
• Kepler publishes 2 laws of planetary motion. Galileo observes the Heavens with a telescope


  1609
• Galileo publishes a book about mechanics called Dialogue Concerning Two New Sciences


  1634
• Axel Cronstedt discovers nickel


  1751
• Daniel Rutherford discovers nitrogen


  1772
• Carl Linnaeus publishes his work Systema Naturae classifying living things


  1758
• William Herschel discovers Uranus


  1781
• Alessandro Volta invents the battery


  1800
• James Hutton publishes Theory of the Earth


  1785
• John Dalton publishes his atomic theory


  1808
• Charles Lyell publishes Principles of Geology

  1830
• Gregor Mendel discovers the law of hereditary


  1866
• Joseph Thomson discovers the electron


  1897
• 1. rays are discovered by Wilhelm Roentgen


  1895