Migration: How far is the Earth from the Moon?

The average distance from the Earth to the Moon is 384,400 kilometers. The Moon’s perigee distance from the Earth is 357,000 kilometers (that is, the surface to the moon’s surface); the farthest apogee distance from the Earth is 406,000 kilometers (that is, plus the Moon and the diameter of the Earth). The moon is the closest planet to our earth. Normally, the moon is about 400,000 kilometers away from the earth. Since the moon orbits the earth in an elliptical orbit centered on one axis, the moon is 50,000 kilometers farther away from the earth than at its closest. It is also a full moon. When the moon is closest to the earth than when it is farthest, the apparent diameter of the moon is 14% larger and the apparent area is 30% larger. It only takes 1.3 seconds for moonlight to travel from the moon to the earth, which means it only takes the blink of an eye. But in such a short time, it covered more than 380,000 kilometers. And the moon's orbit is deflecting outward at a speed of 3.8cm/a, that is, it is moving away from the earth at a speed of 3.8cm per year.