Johannes Kepler

Johannes Kepler <Tab/>Johannes Kepler was born in a small town of Weil der Stadt in Swabia, and moved to nearby Leonberg with his parents in 1576. His mother was the daughter of an innkeeper, and his father was a mercenary soldier. His father is believed to have died in the war in the Netherlands, when Kepler was only 5. Kepler's early education began in a local school and then at a nearby …

…The time it takes for a planet to make on complete revolution around the sun is the planet's period. The squares of the planets periods of revolution are proportional to the cubes of the planets' average distances from the sun. So if not for Brahe's determination to be the astronomer of their time, and giving Kepler that troublesome task of Mars, Kepler would not have been the first to realize the 3 laws of planetary motion.