I do not seek to dispute that the above answer as being officially correct but - bearing in mind that the earth and moon orbit and the earth rotates - will not the distance from any specific point on the earth to the moon depend upon the specific juxtapositions in the respective orbits and point in the rotation of the earth?
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Chow's observation is correct. Also the earth's tilt on its axis should be taken into account. In addition, the moon's orbit is not a perfect circle, so the distance between their respective geological centers does vary a bit over time.
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238,855 miles