Because the rotation period of the moon is exactly the same as that of its period of revolution, you can only see the moon with the same face forever on the earth. From the early days of the formation of the moon, the earth was affected by a moment, which led to the slow rotation speed. This process is called tidal locking. Therefore, part of the angular momentum of the earth's rotation is converted into the angular momentum of the moon's revolution around the earth. As a result, the moon is far away from the earth at a speed of about 38 mm per year. At the same time, the earth's rotation is getting slower and slower, and the length of a day is getting longer every year 15 micron.
The orbit of the moon is increasing at a rate of nearly 3.8 centimeters per year. When it floats to about 654.38+0.2552 million miles (20,200 kilometers) from the earth, it will be very far from the nearest point, so its disk surface will obviously be smaller than that of the sun and will not cover the sun. In this way, it will take about 654.38 billion years for the total solar eclipse to disappear.