Moon clouds. The illuminated area of the visible sphere (degree of illumination) is given by formula_3, where formula_4 is the elongation (i.e., the angle between Moon, the observer (on Earth) and the Sun). The gravitational attraction that masses have for one another decreases inversely with the square of the distance of those masses from each other. As a result, the slightly greater attraction that the Moon has for the side of Earth closest to the Moon, as compared to the part of the Earth opposite the Moon, results in tidal forces. Tidal forces affect both the Earth's crust and oceans. The
Partial/total eclipses on the Moon on Earth as a partial lunar eclipse, unlike the Earth where a total eclipse only occurs in a small spot while the remainder of a solar eclipse are total, on the Moon, a part is shown as partial and a part is shown is total as the center of the Earth's shadow's coverage totality is more larger than the Moon on Earth. In some eclipses, about 15-20% of a surface of the moon covered by the center of the Earth's shadow sees totality where the Earth eclipses the sun, some eclipses has about 75-80% of the surface covered by the