 T l Guitar ♥ l l Bed Police l S
No no need to raise you hand, just shout it out to me.
5 points to Fr2 and Nadia.
Kepler accepted Copernican theory (see Copernican System) immediately, believing that the simplicity of Copernican planetary ordering must have been God's plan. In 1594, when Kepler left Tübingen for Graz, Austria, he worked out a complex geometric hypothesis to account for distances between the planetary orbits—orbits that he mistakenly assumed were circular. (Kepler later deduced that planetary orbits are elliptic; nevertheless, these preliminary calculations agreed with observations to within 5 percent.) Kepler then proposed that the sun emits a force that diminishes inversely with distance and pushes the planets around in their orbits. Kepler published his account in a treatise entitled Mysterium Cosmographicum (Cosmographic Mystery) in 1596. This work is significant because it presented the first comprehensive and cogent account of the geometrical advantages of Copernican theory.
While living in Linz, he published his Harmonice Mundi (Harmony of the World, 1619), the final section of which contained another discovery about planetary motion: The ratio of the cube of a planet's distance from the sun and the square of the planet's orbital period is a constant and is the same for all planets.
So with Brahe's help, Kepler made a HUGE advance in Astronomy. But it also took all those before him. The laws of planetary movement are some on the most important parts to the pysical side of Astronomy. Without them we would be clueless.
Next, Sir Isaac Newton. Any interesting facts about him? |