Due to gravitational forces between Earth and its satellite, the moon moves away at a rate of 3.82 centimeters per year, causing our planet’s rotation to slow, according to the study published in the Proceedings of the National Academy of Sciences.
Earth currently completes a full rotation on its axis every 23 hours, 56 minutes, 4 seconds, according to NASA.
The length of a day has grown one seventy-five thousandth of a second on average per year, and is expected to continue at this rate for the next millions or billions of years.
The Guardian reports that the moon will eventually stop moving when it reaches a stable distance from Earth. When this happens, the two will be tidally locked- rotating at the same pace, with the moon visible from only one side of Earth.
Of course, that’s assuming either of them survive the Sun’s destructive red giant phase.