# Is it possible to estimate, based on the ratio of the sizes of the Moon and the Earth (R = 0.272R3), how many times the illumination

Is it possible to estimate, based on the ratio of the sizes of the Moon and the Earth (R = 0.272R3), how many times the illumination of the surface of the Moon by the Earth is greater than the illumination of the surface of the Earth by the Moon?

The angular area of the Earth’s disk in the sky of the Moon is 13.5 times greater than the area of the Moon’s disk in the Earth’s sky. Illumination of the Moon’s surface by the Earth will not be 13.5 times, but 80-100 times more than the illumination of the Earth by the Moon at the corresponding phases. This is due to the fact that the albedo of the Earth is 6-7 times greater than the albedo of the Moon.

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