Ancient Astronomers

  • 240 BCE

    Eratosthenes

    Greek mathematician and astronomer. Fathered geography. Discovered longitude and latitude that we use on maps today.
  • 150

    Claudius Ptolemy

    Contributed to knowledge of the universe. His worked inspired astronomers to discover lunar and solar eclipses. Phenomenons that we like to view today.
  • 1508

    Nicolaus Copernicus

    Proposed that the Sun was stationary and everything revolved around it.
  • 1572

    Tycho Brahe

    Discovered a new star. He helped change the way people view the solar system and gravity.
  • Johannes Kepler

    Created the three laws of planetary motion. He helped us learn about how the planets orbit the sun.
  • Sir Isaac Newton

    Sir Isaac Newton built the first telescope. Telescopes are used in everyday life to learn more about astronomy today. Discovered gravity as well as taught us how to understand how people stay on the ground instead of float up into space.
  • Albert Einstein

    Famous for studying and devising the theory of relativity. Known for the equation E=mc^2. Helped form the way we understand gravity today.