Ok, but the real questions, imo, are:
How is it possible that the Moon is exactly 400 times smaller than the Sun, and exactly 400 times closer to the Earth than the Sun, making possible an exact total eclipse? Coincidence?
Why do we find a consistent sequence of integer numbers when looking at every major aspect of the Moon, whereas no pattern emerges for any other planet or moon in the solar system?
Why does an ancient system of geometry and measurement used in the Stone Age work perfectly on the Moon?
For these and many other burning questions, I refer you to:
http://www.bibliotecapleyades.net/luna/esp_luna_28.htm