p2 Paige D's Timeline

By paiged
  • 200


    time lived: 87-150
    geocentric theory
    ptolemy thought that the planets and the sun were centered around the earth in this order -mercury, venus, the sun, mars, then juppiter.
  • Jan 1, 1473

    Nicholas Copernicus

    time lived: 1473 - 1543
    Heliocentric theory
    Copernicus thought that the planets revolved around the sun, because of the rising and falling of the sun, moon, and stars.
  • Jan 1, 1564

    Galilio Galilei

    time livevd: 1564 - 1642
    geocentric theory
    Galileo explained how to improve the telescope. he built the first astronomical telescope and was the first to look up in to space, and see the moons surface.
  • Jan 1, 1571

    Johannes Kepler

    time lived: 1571 - 1630
    eliptical orbits
    Kepler discovered that the orbit of the planets were not flat circles but that they were elipses.
  • Sir Isaac Newton

    time lived: 1643 - 1727
    universal law of gravity and inertia
    newton explained the theory of inertia which states that an object in motion tends to stay in motion, and an object at rest tends to stay at rest. Also newton discovered the law of gravity which states that every partical of matter in the universe attracts everey other partical with a force that is directly proportional to the product of the masses of the products and inveraly proportional to the square of the distance between them.