Compared to our view of the Moon, how big does the Earth look from the Moon?
The angular diameter of the Moon as seen from the Earth is 0.5155 degrees. The Earth viewed from the Moon has an angular diameter of 1.8698 degrees. The Earth viewed from the Moon would look 3.627 times larger in diameter than the Moon from the Earth. That means the disc of the Earth would appear 14.072 times larger in surface area than the Moon’s disc viewed from Earth. Because the Earth reflects a higher percentage of the Sun’s light (albedo) than the Moon, the Earth would provide 37.971 times as much light viewed from the Moon as the Moon viewed from the Earth (during comparable phases). .
