astronomy timeline

By BILLNYE
  • 140

    Universe theory

    Greek astronomer Ptolemy develops geocentric theory of the universe with Earth at the center.
  • Mar 24, 1050

    mayan pyramid

    Mayan Pyramid of Kukulkan at chichen itza is also used as calandar
  • Apr 30, 1054

    Supernova

    Chinese astronomers observe supernova in Taurus
  • Apr 30, 1259

    astronomical observatory

    First astronomer Nasir al-Din al-Tusi builds Iran's first astronomical observatory
  • Apr 30, 1420

    Samarkand

    Astronomer Ulugh Beg builds atronomical observatory in Samarkand, central Asia
  • Apr 30, 1543

    heliocentric theory

    Polish astronomer Nicolaus Copernieus publishes his heliocentric theory of the universe.
  • Apr 30, 1572

    supernova in constellaton

    danish astronomer tycho brahe discovers a supernova in constellation of Cassiopeia
  • Apr 30, 1582

    Gregorian calendar

    Pope Gregory 13 introduces the Gregorian calendar

  • Germany

    Kepler's first and second law were annonced

  • use of constellations

    Pacific islanders use constellations to travel across the Pacific Ocean