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History of astronomy

By Emiliano Angeles Labra
  • 400 BCE

    Aristarchus of Samos

    Aristarchus of Samos
    he suggested that the Earth revolved around the Sun
  • 200 BCE

    Hiparchus

    Hiparchus
    classified the stars according to their apparent brigthness
  • 200

    Ptomely

    Ptomely
    suggested a geocentric astronomic model, naccording to him the moon, and all the planets orbit the Earth
  • Sep 12, 1543

    Copernicus

    Copernicus
    published his heliocentric model according to wich the planets revolved around the Sun

  • Tycho Brathe

    Tycho Brathe
    carried out very detailed observation of the planets

  • Galileo

    Galileo
    used a telescope for the first time to observe the night sky

  • Isaac Newton

    Isaac Newton
    build the first telescope using mirrors instead of lenses

  • The principles of natural psichology

    The principles of natural psichology
    was a book published by Isaac Newton wich explained the laws governing the movement of the planets

  • Edmund Halley

    Edmund Halley
    explained Newton's and predicted the retun of the comet

  • W.Hershel

    W.Hershel
    on 1781 he discovered Uranus

  • F.W.Bessel

    F.W.Bessel
    measure the distance from a star for the first time using geometric methods

  • Adams, Galle and Leverrier

    Adams, Galle and Leverrier
    they discovered Neptune

  • spectroscope

    spectroscope
    allows us to identify substances in the stars

  • E.P. Hubble

    E.P. Hubble
    proved that some of the nebulas seen in the sky are in fact independent galaxies

  • C.Tombaugh

    C.Tombaugh
    discovered the planet Pluto

  • extra-solar planets

    extra-solar planets
    the discovery of extra-solar planets