How many Earths could you line up between here and the Moon?

In most diagrams the Moon hangs just off Earth's shoulder. Suppose you set Earth-sized planets side by side across the real gap. How many would fit?

Reveal the answer

About 30. The Moon is on average 384,400 km away, far further than the diagrams suggest, and it drifts about an inch further off every year.

— NASA Science, Moon: Facts

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