How does earth rotate on axis?
Earth has no support to lean on or stop it so it sits in space able spin in any direction. As it revolves around the Sun there is a slight spin force applied to it in the direction that it is revolving – in Earth’s case, counterclockwise. Along with the magnetic heavy metal core, Earth’s moon helps to stabilize the spin and keep it regular. Were the moon gone and the core to stop spinning, over time impacts from meteorites could stop and even counter the spin we see as “day.
