Johannes Kepler

From Wikipedia, a free encyclopedia written in simple English for easy reading.

Monument of Tycho Brahe and Johannes Kepler in Prague
Enlarge
Monument of Tycho Brahe and Johannes Kepler in Prague

Johannes Kepler (lived December 27, 1571November 15, 1630) was a German astronomer. He was Tycho Brahe's apprentice, or person who learns a trade from another person. He looked at the solar system and discovered three laws about how it works. The first was that the orbits, or paths, of planets are "ellipses", or flattened ovals that really have two "centers". The second was that if there was a line between a planet and the Sun, the line would sweep an equal area in equal amounts of time. The third was that if a person multiplied the time it took for a planet to go around the Sun by itself, that person would get the distance of a planet to the Sun multiplied by itself twice.

This short article needs someone to make it better.
You can help Wikipedia by adding to it.