• 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