Great Astronomers

By tylerlidington
  • 384 BCE

    Aristotle

    Proved the earth was a spherical shape and everything revolved around the Earth.
  • 190 BCE

    Hipparchus

    He composed the very first star catalog to track all the stars and the constellations. He also calculated the exact distance from the earth to the sun.
  • 100 BCE

    Ptolemy

    Made manuals that track the moon and sun’s movement. He relied on Hipparchus’s work for the catalog.
  • 1473

    Rennasiance

    Revival of art, literature and learning. Nicolaus Copernicus is an astronomer that noticed a concept that the sun is in the center.
  • 1546

    Tycho Brahe

    Known for his accurate and detailed astronomical observations.
  • 1546

    Galileo

    An Italian astronomer that invented the first telescope, discovered sunspots and Jupiter’s moons.
  • 1570

    Hans Lippershey

    An astronomer from western Germany that invented the very first telescope.

  • Sir Isaac Newton

    He worked of Kepler’s work and invented the reflecting telescope.

  • Giovanni Cassini

    An astronomer who found the separation between Saturn's rings.

  • William Herschel

    He discovered Uranus, 2 more of Saturn’s moons and believed Mars had water.

  • Percival Lowell

    Discovered Pluto and built the Lowell observatory in Flagstaff, Arizona.

  • Ejnar Hertzsprung

    Invented the Hertzsprung_Russel diagram. It shows the correlation between the brightness of stars.

  • Albert Einstein

    Theory of relativity and gravitation.

  • Edwin Hubble

    Using the color of stars, he discovered the universe is expanding, called Hubble’s Law.

  • Karl Jansky

    Discovered radio waves that emanate from space. Radio Waves are huge amounts of energy.

  • Sputnik

    A small satellite that Russia put in space which led other countries to make satellites too.

  • Yuri Gagarin

    First human to orbit the entire earth in 108 minutes. He was also from Soviet Russia.

  • John Glenn

    The first United States citizen to orbit the moon three times.

  • Neil Armstrong

    First man to walk on the face of the moon.

  • The Apollo

    A program designed to land people on the moon and orbit astronauts around the moon.

  • First Space Shuttle Flight

    Space shuttle Columbia was the first reusable space craft.

  • Mars Pathfinder Expedition

    The rover was launched in 1996 and it landed on mars in 1997.