why does the earth spin
Thankfully, Copernicus set the record straight with his heliocentric model, and we now know that the Earth spins on its axis as it revolves around the sun. But why does our planet spin in the first place? Remember Newton's first law of motion? It states that an object remains in whatever state of motion it's in unless another force acts upon it. The Earth is rotating because it's been doing that as long as it has existed. Keep Reading Below Before there were planets in our solar system, there was a spinning, nebulous cloud of dust with our sun at the center.