Here's why:
* Gravity's Influence: The Sun's gravity is the primary force governing the planets' orbital motion. The closer a planet is to the Sun, the stronger the gravitational pull it experiences.
* Orbital Speed: This stronger gravity forces the inner planets to move faster in their orbits to maintain a stable path. Imagine a spinning top – the faster it spins, the more stable it is. The same principle applies to planets.
* Kepler's Laws: This is directly related to Kepler's Third Law of Planetary Motion, which states that the square of a planet's orbital period is proportional to the cube of its average distance from the Sun. This means that planets farther away from the Sun take longer to complete one orbit.
In simpler terms, the inner planets are "whipping around" the Sun much faster than the outer planets because they are held closer by the Sun's gravitational pull.
