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Johannes Kepler

JOHANNES KEPLER

1571 - 1630

Johannes Kepler, the discoverer of the laws of planetary motion, was born in the year 571 in the city of (Wil der Stadt) in Germany, and it happened that that year was the twenty-eighth year of the publication of Cooper Nix’s book, which developed the theory of planetary rotation around the sun, and it was not the other way around, as was the old concept. Kepler was at the University of Tübingen in Germany, where he discussed the Copernicus theory, which had been rejected by many scientists, but he believed in that theory. Then he worked as a professor at the Academy (Graz), where he wrote his first book on astronomy in 1596, and the great astronomer (Tycho Brahe) invited him to become his assistant in his observatory in Prague. Kepler accepted this invitation and joined Tycho in January 1600.

And when (Tycho) died the following year, Kepler inherited his records and the results of his observations of the planets that he had made for several years, and since (Tycho) was the last great astronomer researcher before the invention of the astronomical telescope. Therefore, his comments were of invaluable value.

Kepler finally realized his mistake and the mistake of Copernicus and even Brahe.
And the classical astronomers realized that the rotation of the planets around the sun was not in the form of circles, and the truth is that the rotation of these planets is in an elliptical form and not in a circular way.

After discovering the main solution, Kepler spent several months in complex and tiring calculations, then published his book (The New Astronomy) in 1609, in which he presented the first two laws of planetary motion. The first law mentions that the planets revolve in an elliptical orbit around the sun. As for the second law, it states that the planet moves faster the closer it gets to the sun. Three years later, Kepler published his third law, which states that the farther the planet is from the sun, the longer it will take to complete its revolution around the sun, with the square ratio: the rotation time divided by the cube of the distance that separates it. about the sun.

Kepler's laws, which give an accurate and correct description of the movement of the planets around the sun, have solved the main problems of science. Although Kepler did it. Why do the planets rotate in the orbits that they rotate. This problem had to wait until the end of the century until Isaac Newton solved it, but Kepler's laws were the important and vital introduction to Newton's discoveries.

Teuton once said: «If I see more distances and dimensions than other men, it is because I stand on the shoulders of giants». There is no doubt that Kepler is one of those giants that Neonen meant.