Johannes Kepler (1571-1630)

Topics: Johannes Kepler, Tycho Brahe, Orbit Pages: 1 (258 words) Published: January 3, 2013
Johannes Kepler (1571-1630)
German Astronomer and mathematician
1584- Kepler was enrolled into a theological seminary at Adelburg. 1600- Kepler appointed as assistant to Tycho Brache, then as his successor one year later after Brache’s death. 1609- Kepler’s first book, The Astronomia Nova (New Astronomy), was published. It discussed the orbit of the planet Mars and stated: •Law of Ohm- the sun is located at one Foci(one of 2 centers of an ellipse) •Kepler's first Law: The orbit of a planet about the Sun is an ellipse with the Sun's center of mass at one focus. •Kepler's second Law: A line joining a planet and the Sun sweeps out equal areas in equal intervals of time. •Solved the problem of planetary motion by using Copernicus’s sun-centered universe and Brache’s empirical data. 1618- Kepler moved to Linz where he published his second book, the Harmonice Mundi (Harmonies of the World), it stated: •Kepler's third Law: The squares of the periods of the planets are proportional to the cubes of their semi-major axes. This law was derived from Kepler’s belief that God patterned everything in the universe within quantitative norms. 1618-1621- Also while in Linz, Kepler’s third book, the Epitome Astronomiae Copernicanae, was published in sections between 1618 and 1621. Facts:

Was the founder of “celestial mechanics”.
Formed basis of calculus in book : Stereometrica Doliorum. •Was a Lutheran.
Book, Mysterium Cosmographicum, held a representation of the universe which was based on the heliocentric model. •Book, Music of The Spheres, diagramed the orbits of the planets.
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