sammyzang

By sz@js
  • ptolemy
    200

    ptolemy

    he thought the sun,stars, planets revolve around the earth.
  • nicholas copernicus
    Jan 1, 1473

    nicholas copernicus

    he came up with the helocentric theory
  • galileo galilei
    Jan 1, 1564

    galileo galilei

    improved the telescope venus has phases like the moon . he also dicoved the milky way.
  • johannes kepler
    Jan 1, 1571

    johannes kepler

    the orbit of a planet about the sun is an eclipse with suns center mass at one focus. using a model he made
  • sir isaac newton

    sir isaac newton

    he belived in gravity because he tested 2 different objects dropped will hit the ground at the same time.