* Kepler's Laws of Planetary Motion: Johannes Kepler, a German astronomer, formulated three laws of planetary motion. The second law states that a planet sweeps out equal areas in equal times.
* Orbital Speed: This means that a planet closer to the Sun has to move faster in its orbit to cover the same area in the same amount of time as a planet further away.
* Gravitational Force: The closer a planet is to the Sun, the stronger the Sun's gravitational pull on it. This stronger force necessitates a higher orbital speed to maintain a stable orbit.
Think of it like a spinning top: The faster the top spins, the more stable it is. Similarly, the faster a planet orbits, the more stable its orbit around the Sun.
