5.8 Ancient Astronomers

Timeline created by TSchnizzle
  • -240 BCE

    Eratosthenes

    first accurate measurement of earth's circumference
  • 126

    ptolemy

    ptolematic thory
  • 1543

    Nicholas Copernicus

    Nicholas proposed heliocentric theory
  • Feb 13, 1578

    Tycho Brahe

    Tycho Brahe first sketches of "Tychonic system"
  • Sir Isaac Newton

    law of gravitation
  • Albert Einstein

    Photoelectrical effect
  • Period: to

    Johannes Kepler

    improved the heliocentric theory of Nicolaus Copernicus, explaining how the planets' speeds varied