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Ancient to Modern Day Space Exploration

By Sb17182
  • 100

    Aristotle

    Aristotle
    386-322bce, Aristotle created the GEOCENTRIC model.
  • 200

    Aristarchus

    Aristarchus
    310-230bce, Aristarchus created the HELIOCENTRIC model.
  • 300

    Ptolemy

    Ptolemy
    168bce, Ptolemy created a modifies GEOCENTRIC model of the universe.
  • May 28, 1543

    Copernicus

    Copernicus
    1543, Copernicus used the HELIOCENTRIC model.
  • May 28, 1564

    Galileo

    Galileo
    1564-1642, Galileo proved the HELIOCENTRIC model through parallax. He could observe parallax through his telescope. His telescope allowed him to veiw the outer planets.

  • Kepler

    Kepler
    Alive during the time of Galileo, Kepler modified the HELIOCENTRIC model to include eliptical orbits.

  • Sputnik I

    Sputnik I
    On October 4, 1957, the Soviet Union sucessfully launched it nto orbit. It became the first artificial satellite.

  • First Mission to the Moon

    First Mission to the Moon
    Neil Armstrong and Buzz Arnold were the first people to set foot on another celestial body. There have been 6 total US manned missions to the moon.

  • First Launch of a Spacecraft

    First Launch of a Spacecraft
    On April 12, 1981, the first spacecraft was launched into orbit using rockets. This was also the first orbital mission.

  • Mars Robotic Exploration

    Mars Robotic Exploration
    NASA's Mars Exploration Rover Mission (MER) is a robotic space mission involving Spirit and Opportunity, two rovers, exploring Mars.

  • Newton and Halley

    Newton and Halley
    Alive 1656-1742 Halley and 1642-1746 Newton, the pair tracked Halley's Comet, accurately predicting it's path, proving objects have elliptical orbits.