astronomy

By Christian Hoffman
  • 322 BCE

    Aristotle

    Aristotle
    proved that the Earth is spherical; believed that it was at the center of the universe
  • 190 BCE

    Hipparchus

    Hipparchus
    Wrote the first star catalog and categorized the brightness of stars. Calculated the distance from the moon to Earth correctly.
  • 100

    Ptolemy

    Created geocentric theory. Created an eclipse catalog.
  • 1473

    Copernicus

    Copernicus
    Created Heliocentric theory. Founded scientific method.
  • 1546

    Tycho Brahe

    Tycho Brahe
    created an observatory. Accurate and comprehensive measurements of planetary objects.
  • 1564

    Galileo

    Galileo
    made his own telescope. He saw the craters, mountains, and valleys of the Moon, noticed the huge number of stars making up the Milky Way, kept precise records of sunspot activity and the phases of Venus, and discovered four moons orbiting Jupiter. publicized the fact that other astronomical bodies, such as Jupiter's moons, were clearly revolving around something other than the Earth
  • 1570

    Hans Lippershey

    Hans Lippershey
    patented the telescope
  • 1571

    Johannes kepler

    Johannes kepler
    planets orbit in oval

  • Giovanni Cassini

    Giovanni Cassini
    Discovered divisions in between saturn's rings. Found rotation period of mars and Jupiter.

  • Sir Isaac Newton

    Sir Isaac Newton
    Invented reflecting telescope, three laws of motion

  • William herschel

    William herschel
    discovered uranus and light temperatures.

  • Percival Lowell

    Percival Lowell
    discovered pluto. Built flagstaff observatory

  • Albert Einstein

    Albert Einstein
    studied mercury's orbit and gravity.

  • Karl Jansky

    Karl Jansky
    Discovered the radio waves are emanating from space. Radio waves
    are the longest type of energy waves.

  • John Glenn

    John Glenn
    1st U.S. Citizen to orbit Earth

  • Neil Armstrong

    Neil Armstrong
    first human to walk on the moon

  • Edwin Hubble

    Edwin Hubble
    Using the color of the stars,discovered the universe is expanding. Hubble’s Law, galaxies are moving away from each other. The idea is the basis of the Big Bang
    Theory of how the universe began.

  • Sputnik

    Sputnik
    The importance of Sputnik to the U.S. In the midst of the Cold War, Russia was successful in launching the first satellite into space to orbit Earth. Putting the Soviet Union ahead of the United States. Science and space travel became a new priority for the U.S. and the educational system. In 1958 President Dwight Eisenhower created NASA (National Aeronautics and Space Admin. The Space Race.

  • Yuri Gagarin

    Yuri Gagarin
    First human (Soviet) to orbit Earth

  • apollo program

    apollo program
    The Apollo program was designed to land humans on the Moon and bring them safely back to Earth. Six of the missions achieved this goal. Apollo 13 did not land on the Moon due to a malfunction, but also returned photographs. The six missions that landed on the Moon returned a wealth of scientific data and almost 400 kilograms of lunar samples. Experiments included soil mechanics, meteoroids, seismic, heat flow, lunar ranging, magnetic fields, and solar wind experiments.