Spencer Reed timeline

By srree499
  • 322 BCE

    Aristotle

    Aristotle
    He was a Greek philosopher
  • 100

    Ptolemy

    Ptolemy
    He was a Greek philosopher who wrote about the moon and sun
  • 1473

    Copernicus

    Copernicus
    He was an astronomer.
  • 1543

    Heliocentric

    Heliocentric
    Was a thought for when the Sun centered
  • 1564

    Galileo

    Galileo
    Was an Italian polymath.
  • 1569

    Lowell

    Lowell
    He was an astronomer that found and named Pluto
  • 1573

    Kepler

    Kepler
    He was a German mathematician, astronomer, and astrologer.

  • Geocentric

    Geocentric
    The thought of when the Earth centered

  • Herschel

    Herschel
    He was British astronomer

  • Sputnik

    Sputnik
    A Russian satellite

  • Neil Armstrong

    Neil Armstrong
    1st man to step foot on the moon

  • Hubble

    Hubble
    It was the expansion of the universe