What do objects move along geodesics mean?

Objects move along geodesics means they take the shortest or most natural path through space, just like when you roll a ball on a smooth floor.

Imagine you're playing with your toy car on a flat table. If you push it, it goes straight, right? That’s because there are no hills or curves to make it change direction. Now picture that same toy car on a bumpy surface, it might go up a hill and then come down again. It’s still trying to move forward, but the path is more winding.

Now think of space like a big trampoline. If you roll your toy car on it, the trampoline stretches under the car, making it follow a curvy path, even though the car isn’t turning its wheels! That’s what happens with objects in space: they follow a geodesic, which is like the "straightest" path through a curved surface.

In real life, planets and spaceships move along geodesics too. They’re just following the natural curve of space, it's not magic, just like your toy car follows the trampoline’s shape!