History of Astronomy Timeline

By mariamqasemi
  • 1873 BCE

    Ejnar Hertzsprung

    Ejnar Hertzsprung
    1873-1967 one of the inventors of the Hertzsprung russell diagram.The hr diagram shows the correlation between the absolute magnitude brightness and the spectral type of star.
  • 1625 BCE

    Giovanni Cassini

    Giovanni Cassini
    1625-1712 he was a italian mathematician and astronomer and engineer Italian who discovered the division of the rings of saturn
  • 1564 BCE

    Galileo-

    Galileo-
    1564-1642 from Pisa,Italy italian scientist he was the first person to discover sunspots he proved that the stars are fixed he discovered the 4 main moon in jupiter which was Io,Europa,Ganymede and,Callisto
  • 1546 BCE

    Tycho Brahe

    Tycho Brahe
    1546-1601 an astronomer he is known for his accurate and comprehensive and planetary observations.
  • 1473 BCE

    Copernicus-

    Copernicus-
    1473-1543 he proposed that the sun is in the center (heliocentric)The founder of the scientific method.he is also a mathematician and astronomer
  • 322 BCE

    Aristotle

    Aristotle
    384-322 BC proved that the earth is spherical he knew if the earth revolved around the sun then we should see the stars shift position throughout the year.
  • 190 BCE

    Hipparchus

    Hipparchus
    190-120 BC he compiled the first star catalogue. First person to come up with equinoxes.He also calculated the distance between earth and moon and got the distance right.
  • 165 BCE

    Ptolemy

    Ptolemy
    165-85 bc He made the geocentric theory he also made a book almagest.
  • 1570

    Hans Lippersheyq

    Hans Lippersheyq
    1570-1619 Dutch German spectacle maker he was associated with the invention of the telescope maker because he was the first person to try to obtain a patent for it.
  • 1571

    Johannes Kepler-

    Johannes Kepler-
    1571-1630 Kepler was German mathematician,astronomer and astrologer.Kepler is a key figure in the 17th century scientific revolution.Kepler also defended the idea that planets orbit around the sun.

  • Refracting Telescope

    Refracting Telescope
    1608 A refracting telescope is a telescope that is a type of optical telescope that uses a lens as its objective to form an image.This was originally used in spy glasses and astronomical telescopes.A reflector telescope uses two mirror instead of two lenses

  • Sir Isaac Newton

    Sir Isaac Newton
    1643-1727 newton began developing his influential theories on light.Newton developed the three laws of motion which form the basic principles of modern physics.Invented the reflecting telescope.

  • Reflecting Telescope-

    Reflecting Telescope-
    -1668 A reflecting telescope is a telescope that uses a single or combination of curved mirrors that reflect light and form an image.it is different from a refracting telescope because a rainbow seen around some objects viewed with a refractor telescope.

  • Cassini orbiter

    Cassini orbiter
    The Saturn orbiter is named after Jean Dominique Cassini who discovered the Saturnian satellites Lapetus in 1671, Rhea in 1672, and both Tethys and Dione in 1684.

  • William Herschel

    William Herschel
    1738-1822 discovered the planet uranus and its moons.he also discovered 2 more of saturn's moons.believed there was water on mars.the one who discovered the different colors are different temperature.

  • Percival Lowell

    Percival Lowell
    1855-1916 discovered the planet pluto and studied the “canals” on mars.Built the lowell observatory in flagstaff.

  • Edwin Hubble

    Edwin Hubble
    -1889-1953 using the color of the stars discovered the universe is expanding hubble law galaxies are moving away from each other.The idea is the basis of the big bang theory of how the universe began.

  • Albert Einstein

    Albert Einstein
    -1879-1955 Theory of relativity 1905 and gravitation

  • Karl jansky-

    Karl jansky-
    1905-1950 Karl Guthe Jansky was an American physicist and radio engineer who in August 1931 first discovered radio waves emanating from the Milky Way.He is considered one of the founding figures of radio astronomy.He invented the radio telescope discovered radio waves

  • Sputnik

    Sputnik
    -history changed on October 4,1957 when the .U.S. launched successfully launched sputnik.Sputnik was the first artificial satellite about the size of a beach ball.it was so important because the russians always was ahead of the united states.

  • Yuri Gagarin-

    Yuri Gagarin-
    1961 Yuri was a soviet pilot and cosmonaut he was the first human to journey into outer space when his space aircraft completed an orbit of the earth on April 12,1961 108 minutes.

  • John Glenn

    John Glenn
    1962 John Glenn was a United States Marine Corps aviator engineer astronaut and United States Senator from Ohio. In 1962 he became the first American to orbit the Earth circling it three times.

  • Apollo Missions

    Apollo Missions
    1963 - 1972 the Apollo program was designed to land humans on the moon and bring them back to earth safely.

  • Neil Armstrong

    Neil Armstrong
    1930 - 2012 Neil Armstrong was an american astronaut and was the first person to walk on moon on 1969 U.S.

  • First Space Shuttle Flight

    First Space Shuttle Flight
    April 12, 1981 The columbia was the first reusable spacecraft.Launch like a rocket and land like a plane.

  • Mars Pathfinder Expedition

    Mars Pathfinder Expedition
    Mars pathfinder was launched December 4,1996 and landed on mars area valis on july 4 1997 it was a designed as a technology demonstration of a new way to deliver an instrumental leader and the first ever robotic rover.

  • Spacex Falcon Heavy

    Spacex Falcon Heavy
    Falcon heavy partially reusable heavy lift launch vehicle designed and manufactured by spaceX February 6,2018.