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KEY EVENTS IN ASTRONOMY

By Pau Ortiz

  • 4TH-3TH CENTURY

    A greek astronomer suggested that the earth revolved around the Sun.

  • 2ND CENTURY BC

    A greek astronomer Hiparchus classified the stars according to their apparent brighteness

  • 2ND CENTURY

    Ptolomy suggested a geocentric astronomy model. According to him, the Sun, The moon and the 5 known planets