WORLD HISTORY

Detailed explanation-1: -The story of our greater understanding of planetary motion could not be told if it were not for the work of a German mathematician named Johannes Kepler. Kepler lived in Graz, Austria during the tumultuous early 17th century.

Detailed explanation-2: -Kepler’s Laws of Planetary Motion While Copernicus rightly observed that the planets revolve around the Sun, it was Kepler who correctly defined their orbits.

Detailed explanation-3: -Quick Info. Johannes Kepler was a German mathematician and astronomer who discovered that the Earth and planets travel about the sun in elliptical orbits. He gave three fundamental laws of planetary motion. He also did important work in optics and geometry.

Detailed explanation-4: -Kepler’s First Law stated that planets move in elliptical paths around the Sun. He also discovered that planets move proportionally faster in their orbits when they are closer to the Sun; this became Kepler’s Second Law.

Detailed explanation-5: -The elliptical orbits of planets were indicated by calculations of the orbit of Mars. From this, Kepler inferred that other bodies in the Solar System, including those farther away from the Sun, also have elliptical orbits. The second law helps to establish that when a planet is closer to the Sun, it travels faster.