Life & Contributions to Science
Birth & Childhood
Interest in Science
Hardships throughout scientific career
The changes in the velocities of the planets was another question Kepler struggled with.He realized that a planet moved slower when it was farther away from the sun. Once he understood that planets traveled in ellipses, he determined that an invisible line connecting the sun to a planet covered an equal amount of area over the same amount of time. This was published as his Second Law, along with his first, in 1609.
Kepler's Third Law was published a decade later, and showed that the relationship between the period of two planets, is connected to their distance from the sun. That the square of the ratio of the period of two plants is equal to the cube of the ratio of their radius. While his first two laws focus on a single planet's movement, his third is more about comaring the distance between the orbit of two planets.
"Johannes Kepler." Famous Scientists. N.p., n.d. Web. 10 Dec. 2014.
"NASA's Cosmos." NASA's Cosmos. N.p., n.d. Web. 11 Dec. 2014.
"Index of /lessons/less/les1/keplaws/kepler." Index of /lessons/less/les1/keplaws/kepler. N.p., n.d. Web. 11 Dec. 2014.