Ancient Astronomy

By Amy Caudill
  • 140

    Ptolemy

    140 - Greek astronomer Ptolemy develops geocentric theory of the universe
    with Earth at the center
  • Oct 24, 1543

    Copernicus

    1543 - Polish astronomer Nicolaus Copernicus publishes his heliocentric theory
    of the Universe
  • Oct 24, 1572

    Tycho Brahe

    1572 - Danish astronomer Tycho Brahe discovers a supernova in constellation of
    Cassiopeia

  • Galileo

    1609 - Italian astronomer Galileo Galilei uses telescope to discover four moons of
    Jupiter, craters of the moon and the Milky Way Galaxy

  • Galileo

    1610 - Galileo Galilei discovers Saturn’s rings