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The Most Significant Events In Astronomy

By AlexiaPG
  • Big Bang
    13,000 BCE

    Big Bang

    It happened between 13 and 20 billion years ago at the center of the Universe
  • Stonehenge
    3000 BCE

    Stonehenge

    The main stones of Stonehenge are put into place.
  • The Earth revolves around the Sun
    280 BCE

    The Earth revolves around the Sun

    Samos (Alexandria) Aristarchus suggests the Earth revolves around the Sun. He provides first estimation of Earth-Sun distance.
  • Earth´s circumference
    240 BCE

    Earth´s circumference

    Eratosthenes measures the circumference of the earth with surprising accuracy
  • Geocentric model
    140 BCE

    Geocentric model

    Ptolemy suggests geocentric theory of the universe in famous work Mathematike Syntaxis.
  • Hipparchus
    130 BCE

    Hipparchus

    Greece, Hipparchus develops the first acccurate star map and star catalogue with over 850 of the brightest stars.
  • Heliocentric Model
    Sep 13, 1543

    Heliocentric Model

    Copernicus publishes his heliocentric theory of the Universe.
  • Telescope

    Telescope

    Galileo uses telescope for astronomical purposes. He discovers 4 Jovian moons, the Moon's craters and the Milky Way galaxy
  • Newton

    Newton

    The first reflecting telescope was built by Newton.
  • Uranus

    Uranus

    The discovery of Uranus by Herschel
  • Apollo 11

    Apollo 11

    Armstrong and Aldrin walk on the Moon as part of Apollo 11 mission.
  • Mars

    Mars

    New evidence found for water on Mars