Astronomy

By kiestew30
  • 240 BCE

    Eratosthenes

    In 240 B.C. he made the first accurate measurement at the Earth's circumference. It is important, because it still contributes to scientists studying the Earth.
  • Period: 240 BCE to

    ancient astronomy

  • 150 BCE

    Ptolemy

    Approximately 150 B.C. Ptolemy modeled our solar system, which is important because it was the first real idea of our solar system
  • 1514

    Copernicus

    He made the model of the solar system where the sun was the center. This is important, because it is an accurate depiction of the solar system.
  • 1562

    Tycho Brache

    He recorded the positions of the planets approximately ten times more accurately than anyone else. This is important because it helped future scientists study the planets.

  • Johannes Kepler

    Kepler came up with the three laws of planetary motion. It is important because it proved that planets move in an elliptical patetrn, and not perfect circles.

  • Isaac Newton

    Newton discovered the laws of motion, which is important because it set the standard for modern physics.

  • Albert Einstein

    He produced the theory of relativity, which revolutionized science. This theory also made nuclear weapons and power a possibility.