Imagine you're on a swing, if you keep swinging just right, you never fall down. Satellites are like that: they’re moving so fast around Earth that gravity keeps pulling them in, but they don’t fall back down because they’re always moving forward. This is called orbit.
Why It Works
Earth’s gravity pulls the satellite toward it, just like a rope pulls you on a swing. But the satellite moves sideways at such a high speed that instead of falling straight down, it keeps going around Earth, kind of like it’s dancing with gravity.