Astronomy

  • Aristotle
    384 BCE

    Aristotle

    Aristotle made the geocentric universe.
  • Ptolemy
    100

    Ptolemy

    Ptolemy supported a geocentric universe.
  • Copernicus
    1473

    Copernicus

    He made the earth we know today.
  • Tycho Brahe
    Dec 14, 1546

    Tycho Brahe

    He helped the geocentric universe.
  • Galileo
    Feb 15, 1564

    Galileo

    He improved telescopes and was the first to see craters on the moon.
  • Hans Lippershey
    1570

    Hans Lippershey

    Hans Lippershey supposedly made the telescope.
  • Johannes Kepler
    Dec 27, 1571

    Johannes Kepler

    Made/discovered laws of planetary motion.
  • Refracting telescope

    Refracting telescope

    Telescope with converging lens that collect light.
  • Giovanni Cassini

    Giovanni Cassini

    He discovered the gap between Saturn's rings and discovered four of it's largest moons.
  • Sir Isaac Newton

    Sir Isaac Newton

    Newton helped us understand gravity (the three laws of motion).
  • Reflecting telescope

    Unlike the refracting telescope the reflecting telescope uses a mirror.
  • William Herschel

    William Herschel

    He discovered Uranus and its two moons.
  • Percival Lowell

    Percival Lowell

    He predicted that another planet past Neptune and he found Pluto.
  • Ejnar Hertzsprung

    Ejnar Hertzsprung

    He classified types stars by color and brightness.
  • Albert Einstein

    Albert Einstein

    He helped with everything from gravitational waves to the orbit of Mercury.
  • Edwin Hubble

    Edwin Hubble

    He was the first to know that other galaxies exist.
  • Karl Jansky

    Karl Jansky

    He discovered extraterrestrial radio waves.
  • Sputnik

    Sputnik

    It was the first satellite every sent to space
  • Yuri Gagarin

    Yuri Gagarin

    First human in space.
  • John Glenn

    John Glenn

    First American to orbit Earth.
  • The Apollo Program

    The Apollo Program

    First american space missions.
  • Neil Armstrong

    Neil Armstrong

    First human on the moon.
  • First Space Shuttle flight

    First Space Shuttle flight

    First re-usable space shuttle
  • 1996 Mars Pathfinder Expedition

    1996 Mars Pathfinder Expedition

    It was the first rover ever used.
  • Cassini Orbiter

    Cassini Orbiter

    Landed on Titan (Saturn's largest moon) and revolutionized our understanding of Saturn and it's planets.
  • Astronomy Now

    NASA found a recently formed galaxy (Cosmic tadpole)