Born on December 27, 1571 in Germany, Kepler went on to study theology at University of Tubingen. His education was the first step toward his revolutionary ideas. He was first influenced by his mathematics professor who was an ardent believer in the heliocentric theory of planetary motion (seen below-right). This theory was in itself revolutionary, as it based the solar system around the sun as opposed to all items in the solar system revolving around the earth. Likewise, Kepler accepted the Heliocentric model of planetary motion, originally developed by Copernicus, to be a simplistic explanation for the layout of the solar system. He soon left Germany to study in Austria where he began to work out complex equations which proved specific distances between

Kepler’s Second Law of Planetary Motions has to do with equal areas. Kepler concluded according to immense observation that planets in their rotation move the same distance (area) over a certain time period whether they are closer to the foci or farther away from the foci. However, this proposal drew another question: How is it possible that an object farther away from the focus can travel the same distance over the same time period? According to Kepler, the planets farther away from the focus (or in this case, the sun) have to travel at a great velocity than those that are closer to the sun. As shown in the next diagrams, we can see that planets in their orbit travel the same distance over the same time period, and also that the planets farther way from the sun have to travel quicker than those closer to the sun. The diagram above shows the earth traveling a distance of 70 squares in one month, and then shows a seemingly shorter distance (which in actuality, it is not) traveling the same distance over the same time period. To the right, you can see how this actually works with the planet on the right having to move faster than the one on the left in order to keep up in it’s orbit.

planetary orbits, which at the time he believed to be circular. He went on to declare that the sun emitted some force that grew greater as objects approached the it. This force pushes the planets in the solar system into thei

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