Historic Astronomers

By reaghan_lapinski
  • Mar 25, 1085

    Claudius Ptolemy

    According to Claudius Ptolemy, the Earth was the center of the universe. Past the sun, he thought the only planets were Mars, Jupiter and Saturn because they were the only planets that could be seen with a naked eye.
  • Mar 31, 1532

    Nicolaus Copernicus

    Used data to for a sun-centered cosmology launching modern astronomy.
  • Mar 31, 1572

    Tycho Brahe

    The last naked eye-astronomer, and proved that the heavens were not fixed

  • Galileo Galiei

    Used a telescope to collect evidence that supported a sun-centered model of the solar system.

  • Isaac Newton

    Developed 3 laws of motion and the theroy of universal gravitiy which helps us understand the Universe

  • Henrietta Leavitt

    Discovered the relationship between the brightness of a star and the amount of time it was taking to vary in brightness. Becuase of this others could estamate how far away stars were and begin mapping.

  • Edwin Hubble

    Edwin Hubble demonstrated that the universe was bigger than previously thought and proved that the universe was expanding. He used a very powerful telescope