Why doesn't the Earth stop spinning?

Our planet has been spinning for billions of years and will continue to spin for billions more. This is because nothing in space is stopping us. There is no gravity in space, and so you and Earth continue to spin around and around at a thousand miles per hour.

Today, Earth continues to spin because of inertia, which is an object's resistance to changes in its current state of motion. While the moon, the sun, and other objects in our solar system create forces that work against Earth's spin, they're not strong enough to prevent our blue marble from stopping.