Here's how it works:
* Newton's Law of Universal Gravitation: Every object in the universe attracts every other object with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
* The Sun's Gravity: The Sun is incredibly massive, so it exerts a strong gravitational pull on all the planets in our solar system.
* Centripetal Force: For a planet to stay in orbit, it needs a force pulling it towards the Sun. This force is provided by the Sun's gravity.
* Balance: The planet's inertia (its tendency to move in a straight line) and the Sun's gravity are constantly in balance. The planet is constantly falling towards the Sun, but its sideways motion prevents it from crashing into the Sun. This results in a curved path – an orbit.
Think of it like swinging a ball on a string. The string provides the centripetal force that keeps the ball moving in a circle. Similarly, the Sun's gravity acts like the string, keeping the planets in their orbits.
