How Does ‘Gravity’ Affect the Movement of Planets?

Gravity is like a giant invisible string that pulls planets toward the sun. When a planet moves fast enough, it doesn’t fall into the sun, it keeps going around and around, just like when you swing on a rope.

Imagine you're holding a ball on a string and spinning in circles. If you let go, the ball would fly off in a straight line. But gravity acts like that string: it tugs the planet toward the sun while the planet keeps moving forward, making it orbit instead of falling down.