History of Astronomy

By zmmil361
  • 384 BCE

    Aritotle

    384-322 BC Aristotle proved the Earth was round,. He believed in
    The Geocentric Model which says the Earth is the center universe. Planets and stars were also attached shell that move around.
  • 190 BCE

    Hipparchus

    190-120 BC Compiled the first star catalog. Calculated the distance between earth and moon. Came up with equinoxes, the time when the sun crosses the celestial equator.
  • 165 BCE

    Potolemy

    Ptolemy-165-85 BC Claudius Ptolemy made geocentric model which was named after him. He made the Almagest book it was an eclipses catalog.
  • 1473

    Copernicus

    Copernicus-1473-1543 He believed in the heliocentric model, that the Earth revolves around the sun. He's the founder of scientific method.
  • 1546

    Tycho Brahe

    Tycho Brahe- 1546-1601 Made accurate and comprehensive planetary observations and measurements. Found that the stars are fixed.
  • 1564

    Galileo

    1564-1642 An Italian scientist who discovered the galilean moons, the four largest moons of jupiter's 60. THe moons are Io, Callisto, Europa, and Ganymede. He also made one of the first telescopes, discovered sunspots, and proved stars are not fixed to shells.
  • 1570

    Hans LIppershey

    Hans Lippershey-1570-1619 He was originally a lens maker. He was the first person to patent a telescope.
  • 1571

    Johannes Kepler

    1571-1630 Created laws to how planets move. They move in elliptical orbits with the sun at one focus.

  • Refracting Telescope

    Uses a lens to form an image 1608

  • Giovanni Cassini

    1625-1712 First to observe Saturn’s moons. Discovered rings of saturn are separated.

  • Sir Isaac Newton

    1642-1727 Invented a reflecting telescope. Further works works of Copernicus and Kepler

  • Reflecting Telescope

    Uses mirrors to form image 1668

  • William Herschel

    1738-1822 He discovered Uranus, found water on mars and found two of saturn's moons. He also worked with infrared light.

  • Percival Lowell

    1855-1916 He discovered Pluto and studied canalis on mars. He also built Lowell Observatory.

  • Hertzsprung Russell

    1873- 1967 Hertzsprung Russell diagram shows brightness and type of star.

  • Albert Einstien

    1879-1955 Developed theory of relativity and found gravitation.

  • Edwin Hubble

    Discovered universe is expanding using color of stars. Hubble's Law bases of big bang theory.

  • Sutnik

    1957 Russians sent first earth satellite changed education system to focus on math and science. Created NASA

  • Yuri Gagarin

    1961 He was the first human to orbit earth, he was from Russia.

  • John Glen

    1962 First American to orbit earth.

  • Neil Armstrong

    1969 First man on the moon.

  • First Space Shuttle Flight

    1981 Columbia was the first space shuttle to reach space.

  • Mars Pathfinder

    1996 It was the first robotic rover on mars. It delivered data about the planet.

  • Cassini Orbiter-

    1997 A probe with studied saturn and its rings. It took both measurements and pictures. The gap between saturn's rings is called Cassini Division

  • SpaceX Falcon Heavy

    2018 Most powerful rocket and was able to lift 64 tons into orbit.