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Ancient Astronomers

  • 4977 BCE

    Johannes Kepler

    Johannes Kepler
    Johannes Kepler discovered the three major laws of planetary motion. He discovered it in 4977 B.C. He discovered that the Earth and the planets travel around the sun.
  • 1277 BCE

    Claudius Ptolemy

    Claudius Ptolemy
    Claudius Ptolemy discovered an object and its mirror image. He discovered it in 1277 B.C. It is most famous because the object and the mirror image must equal angel's to a mirror.
  • 240 BCE

    Eratosthnes

    Eratosthnes
    He discovered the system of longitude and latitude. He discovered longitude and latitude 240 B.C. His creation was important because it help understand prime numbers better.
  • May 24, 1543

    Nicolaus Copernicus

    Nicolaus Copernicus
    He discovered Earth and the other planets that revolve around the sun. He shred his findings around 1514. It was important because he proposed a heliocentric system, that the planets orbit around the sun.
  • Nov 11, 1572

    Tycho Brahe

    Tycho Brahe
    Tycho Brahe developed astronomical instruments that measured the positions of stars. He discovered the 1572 super nova. This discovery showed that the star was farther away from the moon and among fixed stars, witch were regarded as perfect and unchanging.
  • Sir Issac Newton

    Sir Issac Newton
    Sir Issac Newton discovered the three laws of motion. He discovered the laws of motion in 1666. His laws of motion are important because it is a main thing about mechanics.
  • Albert Einstein

    Albert Einstein
    Albert Einstein discovered the photoelectric effect. He found it in 1905. It is important because it helps draw inferences on atoms and molecules.