

The contrast is that for each of the planets, the ratio of the squares of their periods to the cubes of their average distances from the sun is the same. The third law, unlike Kepler's first and second principles, compares the motion characteristics of distinct planets. Kepler’s third law of planetary motion relates a planet's orbital period and radius to other planets. Kepler’s second law of planetary motion states that each planet moves in such a way that an imaginary line made from the sun to the planet sweeps out the same amount of area in the same amount of time.įor example, if an imaginary line was formed from the earth to the sun, the region swept out by the line would be the same for every 31-day period. Perihelion is the planet's closest point to the sun, and aphelion is the planet's furthest distance from the sun.Kepler’s first law of planetary motion implies that each planet's orbit around the sun is an ellipse with the sun at one of the foci.THE THREE LAWS OF PLANETARY MOTION BY KEPLER The system is isolated from other bodies.


Thousands of particles of debris orbit Earth with many artificial satellites.
