Why Is It So Tricky to Show the Sun, Earth, and Moon in a Diagram?

The Earth-sun-moon system is difficult to accurately depict due to vast size and distance differences. Using a 1 cm marble for Earth, the sun would be a 1-meter beach ball 117 meters away, with the moon as another marble 2 meters from Earth. These scales make a single accurate illustration impossible.

The moon's orbit is more complex than often shown. It primarily orbits the sun, not Earth, due to the sun's stronger gravity. The moon's path always curves toward the sun, even as it moves relative to Earth, contradicting many textbook diagrams showing the moon circling Earth in loops.